[1] K Papp Clin Res & Prob Med Res, Waterloo, ON, Canada
[2] Dermatologikum Berlin, Berlin, Germany
[3] ScIderm Res Inst, Hamburg, Germany
[4] Oregon Med Res Ctr, Portland, OR USA
[5] Harvard Med Sch, Boston, MA 02115 USA
[6] SKiN Ctr Dermatol & Prob Med Res, Peterborough, ON, Canada
[7] Queens Univ, Kingston, ON, Canada
[8] Univ Texas Houston, Dept Dermatol, Houston, TX USA
[9] Univ Melbourne, Melbourne, Vic, Australia
[10] Univ Lubeck, Lubeck, Germany
[11] Merck & Co Inc, Kenilworth, NJ USA