Department of Cardiology, Chinese PLA General Hospital, Beijing 100853, China;
Department of High Altitude Military Hygiene;
Institute of Medicine and Hygienic Equipment for High Altitude Region;
Department of High Altitude Military Hygiene;
Department of High Altitude Military Hygiene;
Department of Cardiology, Chinese PLA General Hospital, Beijing 100853, China;
Institute of Medicine and Hygienic Equipment for High Altitude Region;