title: Response.
authors.affiliation: Division of Gastroenterology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.
authors.forename: Peng-Jen
authors.initials: PJ
authors.lastname: Chen
authors.forename: Tsai-Yuan
authors.initials: TY
authors.lastname: Hsieh
mesh_terms: D002245:Carbon Dioxide; D003113:Colonoscopy / Q000009:adverse effects* / Q000379:methods*; D005260:Female; D006801:Humans; D007327:Insufflation / Q000379:methods*; D008297:Male; D010146:Pain / Q000175:diagnosis*
chemical_list: D002245:Carbon Dioxide