[1] St Thomas Hosp, St Johns Inst Dermatol, London SE1 7EH, England
[2] Heatherwood & Wexham Pk Hosp NHS Trust, Slough SL2 4HL, Berks, England
[3] Watford Dist Gen Hosp, Watford WD18 0HB, England
[4] Cumberland Infirm, Carlisle CA2 7HY, England
[5] Univ Cumbria, Carlisle, England