Flexible sigmoidoscopy--why, where and when?
D003108:Colonic Diseases / Q000175:diagnosis; D003110:Colonic Neoplasms / Q000175:diagnosis; D003362:Cost-Benefit Analysis; D005194:Family Practice; D005336:Fiber Optic Technology; D006801:Humans; D020694:Sigmoidoscopes; D012812:Sigmoidoscopy / Q000191:economics / Q000379:methods*