1. Department of Anesthesiology, Lorestan University of Medical Sciences, Khorramabad, Iran
2. Department of Surgery, Lorestan University of Medical Sciences, Khorramabad, Iran
3. Student of Committee Research, Lorestan University of Medical Sciences, Khorramabad, Iran
4. Department of Epidemiology and Biostatistics, School of Public Health, Lorestan University of Medical Sciences, Khorramabad, Iran