1. Department of Respiratory Medicine, The Affiliated Hospital of Medical School, Ningbo University, Ningbo, Zhejiang 315020, P.R. China
2. Medical Genetics Center, School of Medicine, Ningbo University, Ningbo, Zhejiang 315211, P.R. China
3. Department of Thoracic Surgery, Ningbo No. 2 Hospital, Ningbo, Zhejiang 315010, P.R. China