Maddalena Peghin1, Emilio Bouza2. 1. Infectious Diseases Clinic, Department of Medicine, Presidio Ospedaliero Universitario Santa Maria della Misericordia, Azienda Sanitaria Universitaria Friuli Centrale and University of Udine, Udine 33100, Italy. Electronic address: maddalena.peghin@gmail.com. 2. Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón, Madrid, Spain; Medicine Department, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain.