1. The School of Public Health, Medical College of Qingdao University, Qingdao, P.R China
2. Department of Respiratory Medicine, Xinjiang Uygur Autonomous Region Chest Hospital, The Xinjiang Uygur Autonomous Region, Urumqi, P.R China
3. Tuberculosis Department of The Xinjiang Uygur Autonomous Region Center for Disease Control and Prevention, The Xinjiang Uygur Autonomous Region, Urumqi, P. R China