Affiliation: | 1. Department of Clinical Laboratory, Sun Yat‐Sen Memorial Hospital, Guangzhou, Guangdon, P.R. China;2. Department of Respiratory Medicine, Sun Yat‐Sen Memorial Hospital, Guangzhou, Guangdong, P.R. China;3. Zhongshan School of Medicine, Sun Yat‐Sen University, Guangzhou, Guangdong, P.R. China |