1. Lung Diseases Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
2. Endoscopic and Minimally Invasive Surgery Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
3. 5th Azar Hospital, Golestan University of Medical Sciences, Gorgan, Iran
4. Society Medicine, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran