作者机构:[1]Department of Respiratory and Critical Care Medicine, PekingUniversity First Hospital, Beijing 100034, China
相关基金:This work was supported bygrants from the National Natural Science Foundation of China (No. 30900646) and the National Science Foundation of China (No. 81241004). Conflict of interest: None.
Correspondence to: Dr. MA Jing, Department of Respiratory and Critical Care Medicine, Peking University First Hospital, 8 Xishiku Street, Beijing 100034, China (Tel: 86-10-83575753. Fax: 86-10- 66551733. Email: majjmail@ 163.com)