1. Department of Internal Medicine; American University of Beirut Medical Center; PO Box 11-0236, Riad El Solh Beirut 1107-2020 Lebanon
2. Department of Dermatology; American University of Beirut Medical Center; PO Box 11-0236, Riad El Solh Beirut 1107-2020 Lebanon
3. Department of Biochemistry and Molecular Genetics; American University of Beirut Medical Center; PO Box 11-0236, Riad El Solh Beirut 1107-2020 Lebanon
4. Department of Dermatology; Columbia University Medical Center; New York USA