[1] Univ York, Skin Res Ctr, Hull York Med Sch, York YO10 5DD, England
[2] Univ York, Skin Res Ctr, Hull York Med Sch, York, England
[3] Harrogate & Dist NHS Fdn Trust, Harrogate, England
[4] Nottingham Univ Hosp NHS Trust, Nottingham, England
[5] Univ Nottingham, Ctr Evidence Based Dermatol, Nottingham, England