1. Department of Otolaryngology, Head and Neck Surgery, Srinivas Institute of Medical Sciences and Research, 5-7-712/3 ASRP Street, Dongerkery, Kodialbail, Mangalore, Karnataka 575001, India
2. Department of Otolaryngology, Head and Neck Surgery, Kasturba Medical College, Mangalore, Karnataka, India
3. Department of Radiodiagnosis, Kasturba Medical College, Mangalore, Karnataka, India
4. Department of Clinical and Experimental Medicine, Otolaryngology Unit, University Hospital of Parma, Parma, Italy