1. Department of Dermatology; Facultad de Medicina; Pontificia Universidad Católica de Chile; Santiago Chile
2. Department of Dermatology; Fundación Jiménez Díaz; Madrid Spain
3. Department of Pathology; Hospital de la Santa Creu I Sant Pau; Barcelona Spain
4. Department of Dermatology; Hospital de la Santa Creu I Sant Pau; Barcelona Spain
5. Department of Pathology; Hospital del Mar; Barcelona Spain