Author/Authors :
JAMALI, Jamshid Dept. of Biostatistics - Faculty of Medicine - Shiraz University of Medical Sciences, Shiraz, Iran , ROUSTAEI, Narges Dept. of Biostatistics - Faculty of Medicine - Shiraz University of Medical Sciences, Shiraz, Iran , AYATOLLAHI, Mohammad Taghi Dept. of Biostatistics - Faculty of Medicine - Shiraz University of Medical Sciences, Shiraz, Iran , SADEGHI, Erfan Dept. of Biostatistics - Faculty of Medicine - Shiraz University of Medical Sciences, Shiraz, Iran