1. Golestan Research Center of Gastroenterology and Hepatology, Golestan University of Medical Sciences, Gorgan, Iran;
2. Department of Medical Biotechnology, Faculty of Advanced Technologies in Medicine, Golestan University of Medical Sciences, Gorgan, Iran;
3. Health Management and Social Development Research Center, Golestan university of Medical Sciences, Gorgan, Iran;
4. Department of Biotechnology, Payame Noor University, Tehran, Iran