1. Department of Cellular Pathology, Hospital El Bierzo, Ponferrada, Spain
2. Department of Cellular Pathology, Hospital de la Reina, Ponferrada, Spain
3. Department of Research, Institute for Biomedical Research of A Coruña (INIBIC), University of A Coruña (UDC), A Coruña, Spain
4. Departments of Pathology and Dermatology, Los Angeles Medical Center (LAMC), Southern California Kaiser Permanente, Los Angeles, CA