Author/Authors :
AZADI, Nammam Ali Dept. of Epidemiology and Biostatistics - Medical School - Kurdistan University of Medical Sciences , JELYANI, Keramat Nouri Dept. of Epidemiology and Biostatistics - School of Public Health - Tehran University of Medical Sciences , ROSHANI, Daem Dept. of Epidemiology and Biostatistics - Medical School - Kurdistan University of Medical Sciences