1. Department of Anesthesiology, Shenzhen Longgang Central Hospital, Shenzhen, Guangdong, China (mainland)
2. Continuing Education, Shenzhen Health Capacity Building and Continuing Education Center, Shenzhen, Guangdong, China (mainland)
3. Department of Ultrasound, Shenzhen Longgang Central Hospital, Shenzhen, Guangdong, China (mainland)