1. State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangdong Key Laboratory of Vascular Disease, Guangzhou Institute of Respiratory Health The First Affiliated Hospital of Guangzhou Medical University Guangzhou Guangdong China
2. Division of Pulmonary and Critical Care Medicine The People's Hospital of Inner Mongolia Hohhot Inner Mongolia China
3. Section of Physiology, Division of Pulmonary, Critical Care and Sleep Medicine University of California, San Diego La Jolla California USA