1. Noncommunicable Diseases Research Center, Neyshabur University of Medical Sciences, Neyshabur, Iran.
2. Department of Epidemiology and Biostatistics, School of Public Health, Neyshabur University of Medical Sciences, Neyshabur, Iran.
3. Gastrointestinal and Liver Disease Research Center (GILDRC), Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran.
4. Healthy Ageing Research Centre, Neyshabur University of Medical Sciences, Neyshabur, Iran.
5. Public Health Department, Neyshabur University of Medical Sciences, Neyshabur, Iran.