Maddalena De Bernardo1, Nicola Rosa2. 1. Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, Salerno, Italy. Electronic address: mdebernardo@unisa.it. 2. Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, Salerno, Italy.