1. Department of Cardiovascular Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shanxi 710061, PR China
2. Key Laboratory of Molecular Cardiology, Xi’an Jiaotong University, Xi’an, Shanxi 710061, PR China
3. Institute of Cardiovascular Channelopathy, Xi’an Jiaotong University, Xi’an, Shanxi 7100161, PR China
4. Key Laboratory of Environment and Genes Related to Diseases, Xi’an Jiaotong University, Ministry of Education, Xi’an, Shanxi 7100161, PR China
5. Department of Cardiovascular Medicine, The First Affiliated Hospital of Baotou Medical College, Baotou, Inner Mongolia 014010, PR China
6. Baotou Medical College, Baotou, Inner Mongolia 014010, PR China
7. ECG Room, Xi’an Children’s Hospital, Xi’an, Shanxi 710061, PR China