title: Reply.
authors.affiliation: Indiana University School of Medicine, Indianapolis, Indiana.
authors.forename: Thomas F
authors.initials: TF
authors.lastname: Imperiale
authors.affiliation: University of North Carolina, Chapel Hill, North Carolina.
authors.forename: David F
authors.initials: DF
authors.lastname: Ransohoff
mesh_terms: D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D018570:Risk Assessment / Q000379:methods*