50
Participants
Start Date
July 31, 2013
Primary Completion Date
September 30, 2014
Study Completion Date
November 30, 2014
Formoterol-budesonide
Formoterol-budesonide combined treatment (4.5µg/160µg Q12H)
Theophylline
Theophylline 0.1 Q12H
Placebo
Placebo for theophylline 0.1 Q12H
State Key Laboratory of Respiratory Research Institute., Guangzhou
The First Affiliated Hospital of Guangzhou Medical University, Guangzhou
The First Affiliated Hospital of Guangzhou Medical University
OTHER