1 Department of Dermatology, Hospital Universitari Arnau de Vilanova, University of Lleida, IRBLleida, Lleida, Spain. Electronic address: ecanal.germanstrias@gencat.cat.
2 Department of Dermatology, Hospital Universitari Arnau de Vilanova, University of Lleida, IRBLleida, Lleida, Spain.
3 Department of Pathology, Hospital Universitari Arnau de Vilanova, University of Lleida, IRBLleida, Lleida, Spain.
4 Department of Dermatology, Hospital Universitari Arnau de Vilanova, University of Lleida, IRBLleida, Lleida, Spain; Centre of Biomedical Research on Cancer, Instituto de Salud Carlos III, Madrid, Spain.