We are grateful to Xiao-yan Jin from Shanghai Changning Central Hospital, Li-hong Liu from Liaoning Chaoyang Central Hospital, Zhao-qiu Hu from Shandong Weifang Asthma Hospital, Xin-cai Qiu from ...

ACT: Asthma Control Test; FEV1: Forced expiratory volume in 1 s; PD20: Provocative dose of MCh causing a 20% fall; PEF: Peak expiratory flow. This work was supported by the Innovation Project of ...