What's right and what's left?
Koretz
R L
RL
D000236:Adenoma / Q000473:pathology*; D003106:Colon / Q000473:pathology*; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000473:pathology*; D006801:Humans; D008403:Mass Screening; D012307:Risk Factors; D012812:Sigmoidoscopy