1. The First Affiliated Hospital, Department of Ultrasound Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
2. The First Affiliated Hospital, Department of Cardiothoracic Surgery, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
3. The No.922 Hospital of the People Liberation Army Joint Logistics Support Force, Department of the Laboratory and Blood Transfusion, Hengyang, Hunan 421002, China
4. The First Affiliated Hospital, Department of Infectious Diseases, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China