1. Department of Occupational Medicine, Shahid Sadoughi University of Medical Sciences, Farrokhi Street, Yazd 89138-14389, Iran
2. Department of Otorhinolaryngology, Shahid Sadoughi University of Medical Sciences, Yazd 89138-14389, Iran
3. Cardiovascular Research Center, Isfahan Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan 81465-1148, Iran