1. Institute of Cardiovascular Diseases of PLA, The Second Affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
2. Department of Cardiology, The Second Affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
3. Department of Respiratory Medicine, The Second Affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
4. Department of Medical Ultrasonics, The Second Affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing, China.