1. Institute of Biomolecular Chemistry, National Research Council (CNR), Sassari, Italy
2. Department of Pathology, Hospital-University Health Unit (AOU), Sassari, Italy
3. Skin Cancer Unit, Istituto Scientifico Romagnolo Tumori (IRST), Meldola, Italy
4. Istituto Nazionale Tumori (INT), Fondazione G. Pascale, Naples, Italy