Authors
1 Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran,
2 Tobacco Prevention and Control Research Center, NRITLD, Shahid Beheshti University of Medical Sciences, Tehran, Iran,
3 Department of Epidemiology and Biostatistics, NRITLD, Shahid Beheshti University Of Medical Sciences, Tehran, Iran,
4 Department of Internal Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
Abstract
Keywords