1 Department of Cardiovascular Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China.
2 Department of Humanistic Nursing, Xiangya Nursing School, Central South University, Changsha, Hunan, China.
3 Division of Pulmonary, Allergy & Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, USA.
4 Department of Cardiovascular Medicine, Guangdong General Hospital, Guangzhou, Guangdong, China.
5 Department of Cardiovascular Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China. Electronic address: [email protected].
6 Department of Cardiovascular Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China. Electronic address: [email protected].