Echo Lab, Department of Cardiovascular Disease, Chinese People's Liberation Army General Hospital, Beijing 100853, China;
Echo Lab, Department of Cardiovascular Disease, Chinese People's Liberation Army General Hospital, Beijing 100853, China;
Echo Lab, Department of Cardiovascular Disease, Chinese People's Liberation Army General Hospital, Beijing 100853, China;
Echo Lab, Department of Cardiovascular Disease, Chinese People's Liberation Army General Hospital, Beijing 100853, China;
Echo Lab, Department of Cardiovascular Disease, Chinese People's Liberation Army General Hospital, Beijing 100853, China;