1. First Department of Dermatology, School of Medicine, Faculty of Health Sciences, Aristotle University , Thessaloniki , Greece
2. First Department of Dermatology, University of Valparaiso , Viña del Mar , Chile
3. Department of Dermatology, Faculty of Medicine, University of Chile , Santiago , Chile
4. Centro Dermatológico Dr Ladislao de la Pascua , Mexico City , Mexico
5. Department of Medical Oncology, School of Medicine, Faculty of Health Sciences, Aristotle University , Thessaloniki , Greece
6. Department of Histopathology, Ippokrateio General Hospital , Thessaloniki , Greece
7. Second Department of Dermatology, School of Medicine, Faculty of Health Sciences, Aristotle University , Thessaloniki , Greece