Author/Authors :
Shadmehr, Mohammad Behgam Tracheal Diseases Research Center - National Research Institute of Tuberculosis and Lung Diseases - Shahid Beheshti University of Medical Sciences, Tehran, Iran , Ghorbani, Fariba Tracheal Diseases Research Center - National Research Institute of Tuberculosis and Lung Diseases - Shahid Beheshti University of Medical Sciences, Tehran, Iran , Mokhber Dezfuli, Mojtaba Tracheal Diseases Research Center - National Research Institute of Tuberculosis and Lung Diseases - Shahid Beheshti University of Medical Sciences, Tehran, Iran