1. Department of Cardiothoracic Surgery, Heart Center, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
2. Department of Histology and Embryology, Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
3. Department of Preventive Medicine, Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
4. Department of Anatomy, Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
5. Department of Operation Room, Heart Center, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China