1. Department of Otorhinolaryngology and Head and Neck Surgery; Trieste
2. Department of Pathological Anatomy and Histopathology; University of Trieste, Cattinara Hospital; Trieste
3. Ear, Nose and Throat Department, Rovigo Provincial Hospital; Rovigo Italy
4. Department of Medical Sciences University of Trieste and Cardiovascular Biology, International Centre for Genetic Engineering and Biotechnology (ICGEB); Trieste