1. National Center for Vitiligo; Psoriasis PO Box 300320 Riyadh 11372 Saudi Arabia
2. Wimpole Aesthetic Centre; 48 Wimpole Street London W1G 8SF U.K
3. Multicultural Dermatology Center; Department of Dermatology; Henry Ford Hospital; 3031 West Grand Blvd., Suite 800 Detroit MI 48202 U.S.A