1.Center of Cardiology,Qingdao Fuwai Hospital,Qingdao 266034,China
2.Department of Cardiology,the Eighth People’s Hospital,Qingdao 266100,China
3.Center of Arrhythmia Diagnosis and Treatment,Fuwai Hospital and Cardiovascular Institute,Peking Union Medical College and Chinese Academy of Medical Sciences,Beijing 100037,China |
