title: Authors' response.
authors.affiliation: Division of Applied Health Science, University of Aberdeen, Aberdeen. E-mail: p.murchie@abdn.ac.uk.
authors.forename: Peter
authors.initials: P
authors.lastname: Murchie
authors.forename: E Amalraj
authors.initials: EA
authors.lastname: Raja
authors.forename: Amanda J
authors.initials: AJ
authors.lastname: Lee
authors.forename: Neil C
authors.initials: NC
authors.lastname: Campbell
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008545:Melanoma / Q000401:mortality*; D012878:Skin Neoplasms / Q000401:mortality*