Gasterointestinal endoscopy ward, Amir Alam hospital, Tehran university of medical sciences, Tehran, Iran, Islamic Republic of
Tehran University of Medical Sciences, Tehran, Iran, Islamic Republic of
Tehran University of Medical Sciences-BASIR center, Tehran, Iran, Islamic Republic of
Tehran University of Medical sciences, Imam hospital, Tehran, Iran, Islamic Republic of
Golestan Cohort Center, Gonbad, Golestan, Iran, Islamic Republic of
Hematology-Oncology & SCT Research Center, Teharn, Tehran, Iran, Islamic Republic of
Tehran University of Medical Sciences, School of Public Health Tehran, Tehran, Iran, Islamic Republic o, Tehran, Iran, Islamic Republic of
Tehran University of Medical Sciences, School of Public Health, Tehran, Iran, Islamic Republic of
Rheumatology Research Center, Shariati Hospital, Tehran, Iran, Islamic Republic of
Digestive Disease Research Center, Shariati Hospital, Tehran, Iran, Islamic Republic of
TUMS Digestive Disease Research Center, Tehran, Iran, Islamic Republic of