Ning Shen1, Bei He2. 1. Department of Respiratory Diseases, Peking University Third Hospital, Beijing, 100191, China. 2. Department of Respiratory Diseases, Peking University Third Hospital, Beijing, 100191, China. Electronic address: puh3_hb@163.com.
Authors: Marco Koch; Thomas Butt; Wudong Guo; Xue Li; Yirong Chen; Diana Tan; Gordon G Liu Journal: BMC Public Health Date: 2019-12-23 Impact factor: 3.295