1 State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, 510180, China.
2 Division of Pulmonary Medicine, The People's Hospital of Inner Mongolia, Inner Mongolia Medical University, Hohhot, Inner Mongolia, China.
3 State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, 510180, China. jianwang1986@yahoo.com.
4 Division of Translational and Regenerative Medicine, Department of Medicine, The University of Arizona, Tucson, AZ, 85721-0202, USA. jianwang1986@yahoo.com.
5 State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, 510180, China. wlu92@yahoo.com.