1. Department of Otorhinolaryngology and Head & Neck Surgery, Rudolf Magnus Institute of Neuroscience; University Medical Center Utrecht; Utrecht the Netherlands
2. Department of Internal Medicine; IRCCS Policlinico San Matteo Foundation and University of Pavia; Pavia Italy
3. Department of Medical Sciences; University of Trieste; Trieste Italy
4. Clinic for Hematology, Oncology and Stem Cell Transplantation; Hospital for Children and Adolescent Helsinki University Central Hospital; Helsinki Finland
5. Radboud university medical center; Donders Institute for Brain, Cognition and Behavior; Nijmegen the Netherlands
6. Institute for Maternal and Child Health; IRCCS Burlo Garofolo; Trieste Italy