Broshtilova Valentina, Antonov Dimitar, Bardarov Emil, Tsankov Nikolai
Department of Dermatology and Venereology, Sofia Medical University, 1 Georgi Sofiiski str., Sofia, 1341 Bulgaria.
Skinmed. 2003 Mar-Apr;2(2):134-6. doi: 10.1111/j.1540-9740.2003.01889.x.