Affiliation: | 1 Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University, Chengdu, People's Republic of China 2 Chinese Evidence-Based Medicine/Cochrane Center, West China Hospital, Sichuan University, Chengdu, People's Republic of China 3 Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, People's Republic of China |