[1] Leeds Teaching Hosp NHS Trust, Leeds, England
[2] Univ Hosp Frankfurt, Frankfurt, Germany
[3] Bakersfield Dermatol, Bakersfield, CA USA
[4] Radboud Univ Nijmegen, Nijmegen, Netherlands
[5] Univ Calif Los Angeles UCLA, Los Angeles, CA USA
[6] UCB Pharm, Morrisville, NY USA
[7] UCB Pharm, Monheim, Germany
[8] Northern Care Alliance NHS Fdn Trust, Dermatol Ctr, Manchester, England
[9] Manchester Univ NHS Fdn Trust, NIHR Manchester Biomed Res Ctr, Manchester Acad Hlth Sci Ctr, Manchester Acad Hlth Sci Ctr Manchester, Manchester, England