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Helgi Sigvaldason

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Iceland

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Bjorn Gudbjornsson; Sigurdur B Thorsteinsson; Helgi Sigvaldason; Rannveig Einarsdottir; Magnus Johannsson; Helga Zoega; Matthias Halldorsson; Gudmundur Thorgeirsson
Rofecoxib, but not celecoxib, increases the risk of thromboembolic cardiovascular events in young adults-a nationwide registry-based study.
Kristjan Sigurdsson; Helgi Sigvaldason; Thorbjorg Gudmundsdottir; Rafn Sigurdsson; Haraldur Briem
The efficacy of HPV 16/18 vaccines on sexually active 18-23 year old women and the impact of HPV vaccination on organized cervical cancer screening.
Kristjan Sigurdsson; Frank J Taddeo; Kristrun R Benediktsdottir; Kristrun Olafsdottir; Helgi Sigvaldason; Kristjan Oddsson; Thorunn Rafnar
HPV genotypes in CIN 2-3 lesions and cervical cancer: a population-based study.

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2010: Bjorn Gudbjornsson; Sigurdur B Thorsteinsson; Helgi Sigvaldason; Rannveig Einarsdottir; Magnus Johannsson; Helga Zoega; Matthias Halldorsson; Gudmundur Thorgeirsson
Rofecoxib, but not celecoxib, increases the risk of thromboembolic cardiovascular events in young adults-a nationwide registry-based study.
European journal of clinical pharmacology 2010;66(6):619-25.
2009: Kristjan Sigurdsson; Helgi Sigvaldason; Thorbjorg Gudmundsdottir; Rafn Sigurdsson; Haraldur Briem
The efficacy of HPV 16/18 vaccines on sexually active 18-23 year old women and the impact of HPV vaccination on organized cervical cancer screening.
Acta obstetricia et gynecologica Scandinavica 2009;88(1):27-35.
2007: Kristjan Sigurdsson; Frank J Taddeo; Kristrun R Benediktsdottir; Kristrun Olafsdottir; Helgi Sigvaldason; Kristjan Oddsson; Thorunn Rafnar
HPV genotypes in CIN 2-3 lesions and cervical cancer: a population-based study.
International journal of cancer. Journal international du cancer 2007;121(12):2682-7.
2007: Kristjan Sigurdsson; Helgi Sigvaldason
Is it rational to start population-based cervical cancer screening at or soon after age 20? Analysis of time trends in preinvasive and invasive diseases.
European journal of cancer (Oxford, England : 1990) 2007;43(4):769-74.
2006: Larus Steinthor Gudmundsson; Gudmundur Thorgeirsson; Nikulas Sigfusson; Helgi Sigvaldason; Magnus Johannsson
Migraine patients have lower systolic but higher diastolic blood pressure compared with controls in a population-based study of 21,537 subjects. The Reykjavik Study.
Cephalalgia : an international journal of headache 2006;26(4):436-44.
2006: Laufey Tryggvadottir; Helgi Sigvaldason; Gudridur H Olafsdottir; Jon G Jonasson; Thorvaldur Jonsson; Hrafn Tulinius; Jorunn E Eyfjörd
Population-based study of changing breast cancer risk in Icelandic BRCA2 mutation carriers, 1920-2000.
Journal of the National Cancer Institute 2006;98(2):116-22.
2006: Olafur S Indridason; Sigurjon Birgisson; Vidar Edvardsson; Helgi Sigvaldason; Nikulas Sigfusson; Runolfur Palsson
Epidemiology of kidney stones in Iceland: a population-based study.
Scandinavian journal of urology and nephrology 2006;40(3):215-20.
2006: Kristjan Sigurdsson; Helgi Sigvaldason
Longitudinal trends in cervical histological lesions (CIN 2-3+): a 25-year overview.
Acta obstetricia et gynecologica Scandinavica 2006;85(3):359-65.
2006: Kristjan Sigurdsson; Helgi Sigvaldason
Longitudinal trends in cervical cytological lesions and the effect of risk factors. A 30-year overview.
Acta obstetricia et gynecologica Scandinavica 2006;85(3):350-8.
2006: Kristjan Sigurdsson; Helgi Sigvaldason
Effectiveness of cervical cancer screening in Iceland, 1964-2002: a study on trends in incidence and mortality and the effect of risk factors.
Acta obstetricia et gynecologica Scandinavica 2006;85(3):343-9.
2005: Gudmundur Thorgeirsson; Gudmundur Thorgeirsson; Helgi Sigvaldason; Jacqueline Witteman
Risk factors for out-of-hospital cardiac arrest: the Reykjavik Study.
European heart journal 2005;26(15):1499-505.
2005: Larus Steinthor Gudmundsson; Magnus Johannsson; Gudmundur Thorgeirsson; Nikulas Sigfusson; Helgi Sigvaldason; Jacqueline C M Witteman
Hypertension control as predictor of mortality in treated men and women, followed for up to 30 years.
Cardiovascular drugs and therapy / sponsored by the International Society of Cardiovascular Pharmacotherapy 2005;19(3):227-35.
2005: Gudmundur Porgeirsson; Davíd Davídsson; Helgi Sigvaldason; Nikulás Sigfússon
[Coronary risk factors among men and women in Iceland. Results from the Reykjavik Study 1967-1985. 1992].
Læknablađiđ 2005;91(1):107-14.
2005: Helga M Ogmundsdóttir; Vilhelmína Haraldsdóttirm; Gudmundur M Jóhannesson; Guethríethur Olafsdóttir; Kristín Bjarnadóttir; Helgi Sigvaldason; Hrafn Tulinius
Familiality of benign and malignant paraproteinemias. A population-based cancer-registry study of multiple myeloma families.
Haematologica 2005;90(1):66-71.
2004: Larus Steinthor Gudmundsson; Magnus Johannsson; Gudmundur Thorgeirsson; Nikulas Sigfusson; Helgi Sigvaldason; Jacqueline C M Witteman
Risk profiles and prognosis of treated and untreated hypertensive men and women in a population-based longitudinal study: the Reykjavik Study.
Journal of human hypertension 2004;18(9):615-22.
2004: Gunnar Sigurdsson; Nikulas Sigfusson; Inga Ingibjörg Gudmundsdottir; Uggi Agnarsson; Helgi Sigvaldason; Vilmundur Gudnason
The absolute risk of recurrent myocardial infarction is similar amongst both sexes: MONICA Iceland Study 1981-1999.
European journal of cardiovascular prevention and rehabilitation : official journal of the European Society of Cardiology, Working Groups on Epidemiology & Prevention and Cardiac Rehabilitation and Exercise Physiology 2004;11(2):121-4.
2004: Brynjolfur Y Jonsson; Kristin Siggeirsdottir; Brynjolfur Mogensen; Helgi Sigvaldason; Gunnar Sigursson
Fracture rate in a population-based sample of men in Reykjavik.
Acta orthopaedica Scandinavica 2004;75(2):195-200.
2003: Margret B Andresdottir; Nikulas Sigfusson; Helgi Sigvaldason; Vilmundur Gudnason
Erythrocyte sedimentation rate, an independent predictor of coronary heart disease in men and women: The Reykjavik Study.
American journal of epidemiology 2003;158(9):844-51.
2003: Bjørn Møller; Harald Fekjaer; Timo Hakulinen; Helgi Sigvaldason; Hans H Storm; Mats Talbäck; Tor Haldorsen
Prediction of cancer incidence in the Nordic countries: empirical comparison of different approaches.
Statistics in medicine 2003;22(17):2751-66.
2003: Inga S Thrainsdottir; Thordur Hardarson; Gudmundur Thorgeirsson; Helgi Sigvaldason; Nikulas Sigfusson
Survival and trends of occurrence of left ventricular hypertrophy, gender differences, 1967-92: The Reykjavik Study.
Journal of internal medicine 2003;253(4):418-24.
2002: Nikulas Sigfusson; Gunnar Sigurdsson; Uggi Agnarsson; Inga Ingibjörg Gudmundsdottir; Ingibjörg Stefansdottir; Helgi Sigvaldason; Vilmundur Gudnason
Declining coronary heart disease mortality in Iceland: contribution by incidence, recurrence and case fatality rate.
Scandinavian cardiovascular journal : SCJ 2002;36(6):337-41.
2002: Agnes B Baffoe-Bonnie; Lambertus A L M Kiemeney; Terri H beaty; Joan E Bailey-Wilson; Audrey H Schnell; Helgi Sigvaldason; Guethríethur Olafsdóttir; Laufey Tryggvadóttir; Hrafn Tulinius
Segregation analysis of 389 Icelandic pedigrees with Breast and prostate cancer.
Genetic epidemiology 2002;23(4):349-63.
2002: Ragnar L Magnason; Olafur S Indridason; Helgi Sigvaldason; Nikulas Sigfusson; Runolfur Palsson
Prevalence and progression of CRF in Iceland: a population-based study.
American journal of kidney diseases : the official journal of the National Kidney Foundation 2002;40(5):955-63.
2002: Margret B Andresdottir; G Sigurdsson; Helgi Sigvaldason; Vilmundur Gudnason
Fifteen percent of myocardial infarctions and coronary revascularizations explained by family history unrelated to conventional risk factors. The Reykjavik Cohort Study.
European heart journal 2002;23(21):1655-63.
2002: Brian Patrick O'Neill; Hannes Blondal; Ping Yang; Gudridur H Olafsdottir; Helgi Sigvaldason; Robert B Jenkins; David W Kimmel; Bernd W Scheithauer; Walter A Rocca; Johannes Bjornsson; Hrafn Tulinius
Risk of cancer among relatives of patients with glioma.
Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology 2002;11(9):921-4.
2002: Hrafn Tulinius; Gudridur H Olafsdottir; Helgi Sigvaldason; Adalgeir Arason; Rosa B Barkardottir; Valgardur Egilsson; Helga M Ogmundsdottir; Laufey Tryggvadottir; Sigfridur Gudlaugsdottir; Jorunn E Eyfjord
The effect of a single BRCA2 mutation on cancer in Iceland.
Journal of medical genetics 2002;39(7):457-62.
2002: Helga M Ogmundsdóttir; Vilhelmína Haraldsdóttir; Guethmundur M Jóhannesson; Guethríethur Olafsdóttir; Kristín Bjarnadóttir; Helgi Sigvaldason; Hrafn Tulinius
Monoclonal gammopathy in Iceland: a population-based registry and follow-up.
British journal of haematology 2002;118(1):166-73.
2002: Lilja S Jónsdóttir; Nikulás Sigfússon; Vilmundur Gudnason; Helgi Sigvaldason; Gudmundur Thorgeirsson
Do lipids, blood pressure, diabetes, and smoking confer equal risk of myocardial infarction in women as in men? The Reykjavik Study.
Journal of cardiovascular risk 2002;9(2):67-76.
2002: Jóhann Axelsson; Jón G Stefánsson; Andrés Magnússon; Helgi Sigvaldason; Mikael M Karlsson
Seasonal affective disorders: relevance of Icelandic and Icelandic-Canadian evidence to etiologic hypotheses.
Canadian journal of psychiatry. Revue canadienne de psychiatrie 2002;47(2):153-8.
2001: Hrafn Tulinius; Helga M Ogmundsdottir; Karl G Kristinsson; Helgi Sigvaldason; E Sigvaldadottir; Gudrun Kristjansdottir; Nikulas Sigfusson
Helicobacter pylori antibodies and gastric cancer in Iceland - The decline in IgG antibody level is a risk factor.
APMIS : acta pathologica, microbiologica, et immunologica Scandinavica 2001;109(12):835-41.
2001: Thordur Hardarson; M Gardarsdóttir; Kolbeinn Gudmundsson; Gudmundur Thorgeirsson; Helgi Sigvaldason; Nikulás Sigfússon
The relationship between educational level and mortality. The Reykjavík Study.
Journal of internal medicine 2001;249(6):495-502.
2001: Jon Hrafnkelsson; Hrafn Tulinius; Jón Gunnlaugur Jónasson; Helgi Sigvaldason
Familial non-medullary thyroid cancer in Iceland.
Journal of medical genetics 2001;38(3):189-91.
2000: Gunnar Sigurdsson; Leifur Franzson; Laufey Steingrimsdottir; Helgi Sigvaldason
The association between parathyroid hormone, vitamin D and bone mineral density in 70-year-old Icelandic women.
Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA 2000;11(12):1031-5.
2000: Jon Hrafnkelsson; Hrafn Tulinius; M Kjeld; Helgi Sigvaldason; Jón Gunnlaugur Jónasson
Serum thyroglobulin as a risk factor for thyroid carcinoma.
Acta oncologica (Stockholm, Sweden) 2000;39(8):973-7.
2000: Agnes B Baffoe-Bonnie; Terri H beaty; Joan E Bailey-Wilson; Lambertus A L M Kiemeney; Helgi Sigvaldason; Guethríethur Olafsdóttir; Laufey Tryggvadóttir; Hrafn Tulinius
Genetic epidemiology of breast cancer: segregation analysis of 389 Icelandic pedigrees.
Genetic epidemiology 2000;18(1):81-94.
1999: E M Kojic; Thordur Hardarson; Nikulas Sigfusson; Helgi Sigvaldason
The prevalence and prognosis of third-degree atrioventricular conduction block: the Reykjavik study.
Journal of internal medicine 1999;246(1):81-6.
1999: Uggi Agnarsson; Gudmundur Thorgeirsson; Helgi Sigvaldason; Nikulas Sigfusson
Effects of leisure-time physical activity and ventilatory function on risk for stroke in men: the Reykjavík Study.
Annals of internal medicine 1999;130(12):987-90.
1999: Hrafn Tulinius; Helgi Sigvaldason; Guethríethur Olafsdóttir; Laufey Tryggvadóttir; Kristín Bjarnadóttir
Breast cancer incidence and familiality in Iceland during 75 years from 1921 to 1995.
Journal of medical genetics 1999;36(2):103-7.
1998: Steinunn Thorlacius; Jeffery Struewing; P Hartge; Gudridur H Olafsdottir; Helgi Sigvaldason; Laufey Tryggvadottir; S Wacholder; Hrafn Tulinius; Jorunn E Eyfjörd
Population-based study of risk of breast cancer in carriers of BRCA2 mutation.
Lancet 1998;352(9137):1337-9.
1998: S Vilbergsson; Gunnar Sigurdsson; Helgi Sigvaldason; Nikulas Sigfusson
Coronary heart disease mortality amongst non-insulin-dependent diabetic subjects in Iceland: the independent effect of diabetes. The Reykjavik Study 17-year follow up.
Journal of internal medicine 1998;244(4):309-16.
1998: L S Jónsdóttir; Nikulas Sigfusson; Helgi Sigvaldason; Gudmundur Thorgeirsson
Incidence and prevalence of recognised and unrecognised myocardial infarction in women. The Reykjavik Study.
European heart journal 1998;19(7):1011-8.
1998: Kristjan Sigurdsson; B Sigurdardottir; S Steinsson; Kristrun R Benediktsdottir; T Sigurvinsson; Helgi Sigvaldason
Survival and prognostic factors of endometrial cancer patients in Iceland 1964-1985: can attendance at population-based Pap-smear screening affect survival?
International journal of cancer. Journal international du cancer 1998;79(2):166-74.
1997: A Jónsson; Helgi Sigvaldason; Nikulás Sigfússon
Total cholesterol and mortality after age 80 years.
Lancet 1997;350(9093):1778-9.
1997: Hrafn Tulinius; Nikulás Sigfússon; Helgi Sigvaldason; Kristín Bjarnadóttir; Laufey Tryggvadóttir
Risk factors for malignant diseases: a cohort study on a population of 22,946 Icelanders.
Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology 1997;6(11):863-73.
1997: S Vilbergsson; Gunnar Sigurdsson; Helgi Sigvaldason; AB Hreidarsson; Nikulas Sigfusson
Prevalence and incidence of NIDDM in Iceland: evidence for stable incidence among males and females 1967-1991--the Reykjavik Study.
Diabetic medicine : a journal of the British Diabetic Association 1997;14(6):491-8.
1997: K Guthmundsson; P Hartharson; Helgi Sigvaldason; Nikulás Sigfússon
[Relationship between education and risk factors for coronary artery disease].
Nordisk medicin 1997;112(5):169-75.
1996: E Sigurdsson; Gudmundur Thorgeirsson; Helgi Sigvaldason; Nikulas Sigfusson
Prognostic role of cardiovascular risk factors for men with cardiomegaly (the Reykjavik Study).
The American journal of cardiology 1996;78(12):1355-61.
1996: E Sigurdsson; Nikulas Sigfusson; Helgi Sigvaldason; Gudmundur Thorgeirsson
Silent ST-T changes in an epidemiologic cohort study--a marker of hypertension or coronary heart disease, or both: the Reykjavik study.
Journal of the American College of Cardiology 1996;27(5):1140-7.
1996: R Danielsen; Helgi Sigvaldason; Gudmundur Thorgeirsson; Nikulás Sigfússon
Predominance of aortic calcification as an atherosclerotic manifestation in women: the Reykjavik study.
Journal of clinical epidemiology 1996;49(3):383-7.
1996: Steinar Tretli; Anders Engeland; Tor Haldorsen; T Hakulinen; L G Hörte; Tapio Luostarinen; G Schou; Helgi Sigvaldason; Hans H Storm; Hrafn Tulinius; P Vaittinen
Prostate cancer--look to Denmark?
Journal of the National Cancer Institute 1996;88(2):128.
1995: L S Jónsdóttir; Reynir Arngrímsson; Reynir T Geirsson; Helgi Sigvaldason; Nikulás Sigfússon
Death rates from ischemic heart disease in women with a history of hypertension in pregnancy.
Acta obstetricia et gynecologica Scandinavica 1995;74(10):772-6.
1995: K Kristiansson; Nikulas Sigfusson; Helgi Sigvaldason; Gudmundur Thorgeirsson
Glucose tolerance and blood pressure in a population-based cohort study of males and females: the Reykjavik Study.
Journal of hypertension 1995;13(6):581-6.
1995: E Sigurdsson; Nikulas Sigfusson; U Agnarsson; Helgi Sigvaldason; Gudmundur Thorgeirsson
Long-term prognosis of different forms of coronary heart disease: the Reykjavik Study.
International journal of epidemiology 1995;24(1):58-68.
1995: E Sigurdsson; Gudmundur Thorgeirsson; Helgi Sigvaldason; Nikulas Sigfusson
Unrecognized myocardial infarction: epidemiology, clinical characteristics, and the prognostic role of angina pectoris. The Reykjavik Study.
Annals of internal medicine 1995;122(2):96-102.
1995: Anders Engeland; Tor Haldorsen; Steinar Tretli; T Hakulinen; L G Hörte; Tapio Luostarinen; G Schou; Helgi Sigvaldason; Hans H Storm; Hrafn Tulinius
Prediction of cancer mortality in the Nordic countries up to the years 2000 and 2010, on the basis of relative survival analysis. A collaborative study of the five Nordic Cancer Registries.
APMIS. Supplementum 1995;49():1-161.
1994: I O Ingolfsson; Gunnar Sigurdsson; Helgi Sigvaldason; Gudmundur Thorgeirsson; Nikulas Sigfusson
A marked decline in the prevalence and incidence of intermittent claudication in Icelandic men 1968-1986: a strong relationship to smoking and serum cholesterol--the Reykjavik Study.
Journal of clinical epidemiology 1994;47(11):1237-43.
1994: Hrafn Tulinius; G H Olafsdottir; Helgi Sigvaldason; Laufey Tryggvadottir; K Bjarnadottir
Neoplastic diseases in families of breast cancer patients.
Journal of medical genetics 1994;31(8):618-21.
1994: L Jónasson; J Hallgrímsson; Helgi Sigvaldason; G Olafsdóttir; Hrafn Tulinius
Gastric cancer in Iceland: a retrospective study of resected gastric specimens in a high-risk country during 30 years (1960-1989).
International journal of cancer. Journal international du cancer 1994;57(6):793-8.
1994: M K Magnusson; Nikulas Sigfusson; Helgi Sigvaldason; G M Johannesson; S Magnusson; Gudmundur Thorgeirsson
Low iron-binding capacity as a risk factor for myocardial infarction.
Circulation 1994;89(1):102-8.
1993: I S Thrainsdottir; T Hardarson; Gudmundur Thorgeirsson; Helgi Sigvaldason; Nikulas Sigfusson
The epidemiology of right bundle branch block and its association with cardiovascular morbidity--the Reykjavik Study.
European heart journal 1993;14(12):1590-6.
1993: E Sigurdsson; Gudmundur Thorgeirsson; Helgi Sigvaldason; Nikulas Sigfusson
Prevalence of coronary heart disease in Icelandic men 1968-1986. The Reykjavik Study.
European heart journal 1993;14(5):584-91.
1993: Anders Engeland; Tor Haldorsen; Steinar Tretli; T Hakulinen; L G Hörte; Tapio Luostarinen; K Magnus; G Schou; Helgi Sigvaldason; Hans H Storm
Prediction of cancer incidence in the Nordic countries up to the years 2000 and 2010. A collaborative study of the five Nordic Cancer Registries.
APMIS. Supplementum 1993;38():1-124.
1992: Hrafn Tulinius; Valgardur Egilsson; G H Olafsdóttir; Helgi Sigvaldason
Risk of prostate, ovarian, and endometrial cancer among relatives of women with breast cancer.
BMJ (Clinical research ed.) 1992;305(6858):855-7.
1992: S Nikulásson; J Hallgrímsson; Hrafn Tulinius; Helgi Sigvaldason; G Olafsdóttir
Tumours in Iceland. 16. Malignant tumours of the stomach. Histological classification and description of epidemiological changes in a high-risk population during 30 years.
APMIS : acta pathologica, microbiologica, et immunologica Scandinavica 1992;100(10):930-41.
1992: G Sigurdsson; A Baldursdottir; Helgi Sigvaldason; U Agnarsson; Gudmundur Thorgeirsson; Nikulas Sigfusson
Predictive value of apolipoproteins in a prospective survey of coronary artery disease in men.
The American journal of cardiology 1992;69(16):1251-4.
1992: Hrafn Tulinius; Helgi Sigvaldason; G Olafsdóttir; Laufey Tryggvadóttir
Epidemiology of breast cancer in families in Iceland.
Journal of medical genetics 1992;29(3):158-64.
1991: G P Nielsen; A Theodors; Hrafn Tulinius; Helgi Sigvaldason
Cholecystectomy and colorectal carcinoma: a total-population historical prospective study.
The American journal of gastroenterology 1991;86(10):1486-90.
1991: Nikulas Sigfusson; Helgi Sigvaldason; L Steingrimsdottir; I I Gudmundsdottir; I Stefansdottir; T Thorsteinsson; Gunnar Sigurdsson
Decline in ischaemic heart disease in Iceland and change in risk factor levels.
BMJ (Clinical research ed.) 1991;302(6789):1371-5.
1991: J Axelsson; M Karlsson; G Petursdottir; A G Asgeirsdottir; O Olafsson; Nikulas Sigfusson; A B Way; Helgi Sigvaldason; Steinthor Sigurdsson
Prevalence of cardiovascular risk factors in two separate but genetically-comparable populations.
Arctic medical research 1991;Suppl():509-11.
1990: Hrafn Tulinius; Helgi Sigvaldason; J Hrafnkelsson; G Olafsdóttir; Laufey Tryggvadóttir; K Sigurthsson
Reproductive factors and breast cancer risk in Iceland. A second cohort study.
International journal of cancer. Journal international du cancer 1990;46(6):972-5.
1990: Hrafn Tulinius; Helgi Sigvaldason; G Olafsdóttir
Left and right sided breast cancer.
Pathology, research and practice 1990;186(1):92-4.
1989: J Hrafnkelsson; Hrafn Tulinius; Jon G Jonasson; G Olafsdottir; Helgi Sigvaldason
Papillary thyroid carcinoma in Iceland. A study of the occurrence in families and the coexistence of other primary tumours.
Acta oncologica (Stockholm, Sweden) 1989;28(6):785-8.
1988: G Arnthorsson; Hrafn Tulinius; Valgardur Egilsson; Helgi Sigvaldason; B Magnusson; H Thorarinsson
Gastric cancer after gastrectomy.
International journal of cancer. Journal international du cancer 1988;42(3):365-7.
1988: J Hrafnkelsson; Jon G Jonasson; G Sigurdsson; Helgi Sigvaldason; Hrafn Tulinius
Thyroid cancer in Iceland 1955-1984.
Acta endocrinologica 1988;118(4):566-72.
1988: Hrafn Tulinius; O Bjarnason; Helgi Sigvaldason; G Bjarnadottir; G Olafsdottir
Tumours in Iceland. 10. Malignant tumours of the female breast. A histological classification, laterality, survival and epidemiological considerations.
APMIS : acta pathologica, microbiologica, et immunologica Scandinavica 1988;96(3):229-38.
1985: G Biering; G Snaedal; Helgi Sigvaldason; J Ragnarsson; Reynir T Geirsson
Size at birth in Iceland.
Acta paediatrica Scandinavica. Supplement 1985;319():68-73.
1984: Gunnar Sigurdsson; I Einarsson; J I Josafatsson; G Magnusson; O Olafsson; Helgi Sigvaldason; S Thorarinsson; Hrafn Tulinius
A medical record and information system for primary health care in Iceland. The Egilsstadir Project.
Scandinavian journal of primary health care 1984;2(4):159-61.
1983: A Brekkan; O Kjartansson; Hrafn Tulinius; Helgi Sigvaldason
Diagnostic sensitivity of X-ray examination of the large bowel in colorectal cancer.
Gastrointestinal radiology 1983;8(4):363-5.
1982: Hrafn Tulinius; Nicholas E Day; O Bjarnason; G Geirsson; G Johannesson; M A Liceaga de Gonzalez; Helgi Sigvaldason; G Bjarnadottir; K Grimsdottir
Familial breast cancer in Iceland.
International journal of cancer. Journal international du cancer 1982;29(4):365-71.