1. Shantou University Medical College, Shantou, Guangdong, China (mainland)
2. North China University of Science and Technology, Tangshan, Hebei, China (mainland)
3. Department of Cardiology, Kailuan Hospital, Hebei United University, Tangshan, Hebei, China (mainland)
4. Department of Cardiology, Second Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, China (mainland)