Giulia Paloni1, Enrico Valerio2, Irene Berti1, Mario Cutrone3. 1. Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy. 2. Department of Pediatrics Salus Pueri, University of Padova, Padua, Italy. 3. Pediatric Dermatology Department, Ospedale dell'Angelo, Venice, Italy.