1. Electrocardiogram Room, First Affiliated Hospital of Gannan Medical University, Ganzhou 341000, P.R. China
2. Xingguo County Maternal and Child Health Hospital, Xingguo 342400, P.R. China
3. Department of Orthopedics, Gao’an People’s Hospital, Gao’an 330800, P.R. China
4. Department of Ultrasound Medicine, Xingguo County People’s Hospital, Xingguo 342400, P.R. China
5. Xianning Medical College, Hubei University of Science & Technology, Xianning 437100, P.R. China
6. Department of General Surgery, First Affiliated Hospital of Gannan Medical University, Ganzhou 341000, P.R. China