1. Dermatology Service; Department of Medicine; Memorial Sloan Kettering Cancer Center; 16 E. 60th Street New York NY 10022 U.S.A.
2. Harvard School of Public Health; Social and Behavioral Sciences; Boston MA U.S.A.
3. Department of Dermatology; Sheba Medical Center; Sackler School of Medicine; Tel Aviv University; Tel Aviv 52621 Israel