Corresponding Author: Michael Sand, M.D.

Dermatologic Surgery Unit, Department of Dermatology, Venereology and Allergology, Ruhr-University Bochum, St. Josef Hospital, Gudrunstr. 56, 44791 Bochum (Germany)
Tel. +49-234-5090, Fax +49-234-5093445, E-Mail michael.sand@ruhr-uni-bochum.de