title: Response.
authors.affiliation: Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea.
authors.forename: Chang-Hwan
authors.initials: CH
authors.lastname: Park
authors.affiliation: Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea.
authors.forename: Sun-Young
authors.initials: SY
authors.lastname: Park
mesh_terms: D012809:Colon, Sigmoid / Q000033:anatomy & histology*; D020685:Colonoscopes; D003113:Colonoscopy / Q000295:instrumentation*; D005260:Female; D020699:Gastroscopes; D006801:Humans; D008297:Male