[1] Royal Victoria Infirm, Newcastle Upon Tyne NE1 4LP, Tyne & Wear, England
[2] Univ Hosp Coventry & Warwickshire NHS Trust, Dept Dermatol, Coventry CV2 2DX, W Midlands, England
[3] Kings Coll Hosp NHS Fdn Trust, London SES 9RS, England
[4] Kings Coll London, St Johns Inst Dermatol, London SE1 9RT, England
[5] Royal Free Hosp, London NW3 2QG, England
[6] Univ Birmingham, Birmingham B15 2TT, W Midlands, England
[7] Birmingham & Midland Eye Ctr, Sandwell & West Birmingham NHS Trust, Birmingham B18 7QH, W Midlands, England
[8] Royal Coll Ophthalmologists, London NW1 2HD, England
[9] South Tees Hosp NHS Fdn Trust, Middlesbrough TS4 3BW, Cleveland, England
[10] British Assoc Dermatologists, Willan House,4 Fitzroy Sq, London W1T 5HQ, England