title: The author replies.
authors.affiliation: Warwick, United Kingdom.
authors.forename: Edmund
authors.initials: E
authors.lastname: Leung
mesh_terms: D015179:Colorectal Neoplasms / Q000175:diagnosis*; D055088:Early Detection of Cancer / Q000706:statistics & numerical data*; D005260:Female; D006293:Health Promotion; D006801:Humans; D008297:Male; D012017:Referral and Consultation / Q000706:statistics & numerical data*