1 Section of Oral and Maxillofacial Surgery, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy.
2 Private practice in Brescia, Italy.
3 Private practice in Milan, Italy.
4 Private practice in Bologna, Italy.
5 Section of ENT, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, Verona, Italy.
6 Private practice in Amsterdam, The Netherlands.
7 University Medical Center of Groningen, The Netherlands.