Affiliation: | 1. Department of Cardiology, The Seventh People''s Hospital of Zhengzhou, Zhengzhou, China.; 2. Department of Respiration, Tangdu Hospital, The Fourth Military Medical University, Xi''an, China.; 3. Department of Physiology, The Fourth Military Medical University, Xi''an, China.; 4. Department of Cardiology, Tangdu Hospital, The Fourth Military Medical University, Xi''an, China.; University of Illinois at Chicago, United States of America, |