1. Department of Electrocardiogram, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
2. Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, People’s Republic of China
3. Lankenau Medical Center, Wynnewood, Pennsylvania
4. Fuwai Huazhong Hospital, Zhengzhou, Henan, China
5. Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania