Trends in diagnosing lower gastrointestinal disorders.
D020685:Colonoscopes; D003113:Colonoscopy / Q000379:methods / Q000639:trends*; D003116:Color; D004867:Equipment Design; D005544:Forecasting; D005767:Gastrointestinal Diseases / Q000175:diagnosis* / Q000188:drug therapy / Q000453:epidemiology; D006801:Humans; D008403:Mass Screening; D009780:Occult Blood; D012812:Sigmoidoscopy