A lesson in sigmoidoscopy.
Brock
G
G
Gurekas
V L
VL
D002170:Canada; D015179:Colorectal Neoplasms / Q000517:prevention & control*; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D010821:Physicians, Family / Q000193:education*; D012812:Sigmoidoscopy