1. Department of Dermatology Hospital de la Santa Creu i Sant Pau Barcelona Spain
2. Department of Dermatology, Hospital Luis Calvo Mackenna Facultad de Medicina Universidad de Chile Santiago Chile
3. Department of Dermatology Clínica Alemana de Santiago Santiago Chile
4. Department of Dermatology Baylor College of Medicine Houston Texas USA
5. Departments of Dermatology and Pediatrics Vagelos College of Physicians & Surgeons, Columbia University Medical Center New York New York USA
6. Department of Dermatology Clínica Marly JCG Chía Cundinamarca Colombia
7. Department of Dermatology Hospital Sant Joan de Deu Barcelona Spain