1. Kempf und Pfaltz Histologische Diagnostik Zurich and Department of Dermatology; University Hospital Zurich; Switzerland
2. Department of Dermatology Helios Klinikum Hildesheim; Germany
3. DermDx Miami; Miami Lakes Florida USA
4. IPOLFG - Serviço de Anatomia Patológica; Lissabon Portugal