Department of Emergency Medicine ,Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China;
Medical Insurance Office ,Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China;
Department of Emergency Medicine ,Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China;
Department of Emergency Medicine ,Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China;
Department of Emergency Medicine ,Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China;
Department of Emergency Medicine ,Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China;
Medical Insurance Office ,Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China;