22
Participants
Start Date
December 31, 2014
Primary Completion Date
May 31, 2015
Study Completion Date
May 31, 2015
Placebo
physiological saline
ipratropium bromide
80 µg inhalation once
salbutamol
400 µg inhalation once
Zhujiang Hospital,Southern Medical Universtiy, Guangzhou
Guangzhou Panyu Central Hospital
OTHER
Zhujiang Hospital
OTHER