[1] Univ Sheffield, Sheffield Dermatol Res, Sheffield, S Yorkshire, England
[2] Univ Rochester, Med Ctr, Rochester, NY 14642 USA
[3] Aarhus Univ Hosp, Aarhus, Denmark
[4] Univ British Columbia, Surrey, BC, Canada
[5] Prob Med Res, Waterloo, ON, Canada
[6] Univ Toronto, Toronto, ON, Canada
[7] CCA Med Res, Ajax, ON, Canada
[8] Vital Prospects Clin Res Inst, Tulsa, OK USA
[9] Regeneron Pharmaceut Inc, Tarrytown, NY USA
[10] Sanofi Genzyme, Madrid, Spain