1. Department of Diagnostic Ultrasound & Echocardiography, Pingyang Hospital Affiliated Wenzhou Medical University, Wenzhou, China
2. Department of Anesthesia, Pingyang Hospital Affiliated Wenzhou Medical University, Wenzhou, China
3. Department of Diagnostic Ultrasound and Echocardiography, Sir Run Run Shaw Hospital, Zhejiang University College of Medicine, Hangzhou, China