1. Department of Otorhinolaryngology–Head and Neck Surgery, The Persian Gulf Tropical Medicine Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
2. Department of Epidemiology, The Persian Gulf Tropical Medicine Research Center, The Persian Gulf Biomedical Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
3. Department of Biostatistics and Epidemiology, School of Health and Nutrition, Bushehr University of Medical Sciences, Bushehr, Iran
4. Department of Biochemistry, Faculty of Medicine, Bushehr University of Medical Sciences, Bushehr, Iran
5. Department of Otorhinolaryngology–Head and Neck Surgery, Shiraz University of Medical Sciences, Shiraz, Iran
6. Department of Immunology and Allergy, The Persian Gulf Tropical Medicine Research Center, The Persian Gulf Biomedical Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran