1. Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
2. Clinical Research Development Center, Imam Khomeini and Mohammad Kermanshahi and Farabi Hospitals, Kermanshah University of Medical Sciences, Kermanshah, Iran
3. Department of Biomedical Engineering, Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
4. Industrial and systems engineering faculty, Tarbiat Modares University, Tehran, Iran
5. Department of Biostatistics, School of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
6. Sleep Disorders Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran