[1] Univ Alabama Birmingham, Dept Med, Div Rheumatol & Immunol, Birmingham, AL 35294 USA
[2] Univ Stellenbosch, Mediclin Panorama, Cape Town, South Africa
[3] Univ Stellenbosch, Dept Obstet & Gynecol, Cape Town, South Africa
[4] Ctr Clin & Basic Res, Vejle, Denmark
[5] Univ Texas Southwestern Med Ctr Dallas, Dept Dermatol, Dallas, TX 75390 USA
[6] Univ Penn, Dept Dermatol, Philadelphia, PA 19104 USA
[7] Philadelphia VAMC, Philadelphia, PA USA
[8] Merck & Co Inc, Kenilworth, NJ USA