بررسی رابطه‌ی چاقی و مدت زمان تماشای تلویزیون در دانش‌آموزان مدارس مناطق مختلف شهر تهران در سال 1391

I am working in medical field since January 1980 in different positions from clinic in charge to manager of health section with different national and international organizations in Afghanistan and Pakistan.