[1
]National and Kapodistrian University of Athens 2<sup>nd</sup>Dermatology Department
Athens Greece
[2
]University Hospital Birmingham UK
[3
]University 12 of Octubre Dermatology Department Madrid Spain
[4
]University of Turin Department of Dermatology Turin Italy
[5
]University of Leiden Netherlands
[6
]Medical University of Vienna Department of Dermatology Vienna Austria
[7
]Johannes Wesling Klinikum Minden Department of Dermatology, Venerology, Allergology
und Phlebology Minden Germany
[8
]CHU Paris Hospital St Louis Lariboisiete Paris France