British Association of Dermatologists' guidelines for the care of patients with actinic keratosis 2017. (1st January 2017) - Berker, D.; McGregor, J.M.; Mohd Mustapa, M.F.; Exton, L.S.; Hughes, B.R.; McHenry, P.M.; Gibbon, K.; Buckley, D.A.; Nasr, I.; Duarte Williamson, C.E.; Swale, V.J.; Leslie, T.A.; et al.