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Colorectal Neoplasms
Adenoma
Adenomatous Polyposis Coli
Colonic Polyps
Body Mass Index
Duodenal Neoplasms
Peutz-Jegher's Syndrome
Colonoscopy
Gastrointestinal Endoscopy
Mass Screening
Aspirin
Folic Acid
Anti-Inflammatory Agents, Non-Steroidal
Smad4 Protein
Risk Factors
Prevalence
Prospective Studies
Precancerous Conditions
Randomized Controlled Trials
Young Adult
Co-Publications
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