1. Dermatology Department; University Hospital “Dr José Eleuterio González”; Universidad Autónoma de Nuevo León; Monterrey México
2. Dermatology Department; Faculty of Medicine of ABC; São Paulo Brazil
3. Department of Dermatology, Inselspital; University of Bern; Bern Switzerland
4. Dermatology Clinic Dermaticum; Freiburg i.Br Germany
5. Centro de Dermatología Epidermis; Instituto CUF; Porto Portugal
6. Department of Dermatology; Academic Hospital; University of Gent; Gent Belgium