[1] Univ Hosp Geneva, Dept Dermatol, Pigmented Skin Les Unit, CH-1211 Geneva 14, Switzerland
[2] Skin & Canc Associates, Plantation, FL USA
[3] Univ Miami, Sch Med, Dept Dermatol, Coral Gables, FL 33124 USA
[4] NYU, Ronald O Perelman Dept Dermatol, Sch Med, New York, NY USA