Updated guidance for writing a British Association of Dermatologists clinical guideline: the adoption of the GRADE methodology 2016. (1st January 2017) - Mohd Mustapa, M.F.; Exton, L.S.; Bell, H.K.; Ormerod, A.D.; Hughes, J.R.; Levell, N.J.; Smith, C.H.; McHenry, P.M.; Gibbon, K.; Buckley, D.A.; Leslie, T.A.; Mallon, E.C.; et al.