1. Department of Cellular Pathology; Hospital El Bierzo; Ponferrada Spain
2. Department of Internal Medicine; American British Cowdray Hospital; Mexico City Mexico
3. Department of Dermatology; Private Practice; Guadalajara Mexico
4. Department of Urology; American British Cowdray Hospital; Mexico City Mexico
5. Dermatopathologist and Dermatologist; American British Cowdray Hospital, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran; Mexico City Mexico