Effect of carbocisteine on acute exacerbation of chronic obstructive pulmonary disease (PEACE Study): a randomised placebo-controlled study

Guangzhou Medical University, State Key Laboratory of Respiratory Disease, China Medical University, Shanghai Jiao Tong University, Ruijin Hospital, Second Xiangya Hospital of Central South University, Central South University, Shenyang 242 Hospital, Peking University Third Hospital, Peking University, First Affiliated Hospital of Xi'an Jiaotong University, The First Affiliated Hospital, Sun Yat-sen University, Fudan University, Zhongshan Hospital, Sun Yat-sen University, Xinqiao Hospital, Beijing Chao-Yang Hospital, Tianjin Medical University, Tianjin Medical University General Hospital, Nanjing General Hospital of Nanjing Military Command, Changhai Hospital, Second Military Medical University, Dalian Medical University, Second Affiliated Hospital of Dalian Medical University, First People's Hospital of Foshan, Second Affiliated Hospital of Guangzhou Medical University, Shenzhen Second People's Hospital, Panyu Hospital of Chinese Medicine