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Ireland
Northern Ireland
Vitamin D
Parathyroid Hormone
Osteocalcin
Cholecalciferol
Micronutrients
Diet Records
Dietary Supplements
Diet
Vitamin D Deficiency
Nutrition Policy
Seasons
Nutritional Requirements
Analysis of Variance
Energy Intake
Biological Markers
Food Habits
Nutritional Status
Diet Surveys
Co-Publications
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