1. Dermatology Service, Gustave Roussy Institute, France
2. Pathology Department, Henri-Mondor University Hospital, Créteil, France
3. Department of Medicine, Gustave Roussy Institute, Villejuif, France
4. Pathology Department, Gustave Roussy Institute, Villejuif, France
5. Dermatology Department, Institut Claudius Regaud, Toulouse, France
6. Dermatology Service, Tenon Hospital, Paris, France
7. Gastrointestinal Service, Tenon Hospital, Paris, France