1. Department of Pediatrics, Peking University 1st Hospital, Beijing, China
2. Department of Pediatrics, Zhongnan University Xiangya 2nd Hospital, Hunan Province, China
3. Department of Pediatrics, Tongji Medical College of Huazhong University of Science and Technology, Hubei Province, China
4. Department of Electrocardiogram, Fudan University Pediatric Hospital, Shanghai, China
5. Peking University Health Science Center and Key Laboratory of Molecular Cardiovascular Medicine, Ministry of Education, Beijing, China