1. Department of Nursing, Zeynab (P.B.U.H) School of Nursing and Midwifery, Guilan University of Medical Sciences, Rasht, Iran
2. Gastrointestinal and Liver Diseases Research Center, Guilan University of Medical Sciences, Rasht, Iran
3. Department of Biostatistics and Epidemiology, School of Health, Guilan University of Medical Sciences, Rasht, Iran