Hosein Didekhani, Mohammad Reza Hoseini, Parviz Saeidi, Rasoul Neyshabouri,

ramin ravangard assistant professor, department of health services management, school of management and medical information sciences, shiraz university of medical sciences, shiraz, iran. zahra sajjadnia assistant professor, department of statistics, college of sciences, shiraz university, shiraz, iran. abdosaleh jafari msc, department of health services management, school of management and medical information sciences, shiraz university of medical sciences, shiraz, iran. najme shahsavan bsc, department of health services management, school of management and medical information sciences, shiraz university of medical sciences, shiraz, iran. jamshid bahmaie msc student in health services management, department of health services management, school of management and medical information sciences, shiraz university of medical sciences, shiraz, iran. mohammadkarim bahadori assistant professor, health management research center, baqiyatallah university of medical sciences, tehran, iran.