60
Participants
Start Date
February 28, 2013
Primary Completion Date
October 31, 2014
Study Completion Date
October 31, 2014
bambuterol
Patients will be randomized allocated to receive three treatment sequences I, II and III, every treatment period is separated by a washout period of 7 days.
Placebo
Guangzhou First Municipal People's Hospital, Guangzhou
Nanfang Hospital of Southern Medical University, Guangzhou
Guangzhou Institution of Respiratory Disease (GIRD), The First Affiliated Hospital of Guangzhou Medical University, Guangzhou
Nanfang Hospital, Southern Medical University
OTHER
Guangzhou First People's Hospital
OTHER
The First Affiliated Hospital of Guangzhou Medical University
OTHER