1. Department of Cardiothoracic Surgery, Taizhou First People's Hospital, Taizhou, Zhejiang 318020, P.R. China
2. Department of Respiratory Medicine, Taizhou First People's Hospital, Taizhou, Zhejiang 318020, P.R. China
3. School of Medical and Pharmaceutical Engineering, Taizhou Vocational and Technical College, Taizhou, Zhejiang 318000, P.R. China
4. Department of Cardiothoracic Surgery, Taizhou First People's Hospital, Taizhou, Zhejiang 318020, P.R. China