Correspondence to: Feng Xu, MD, PhD, Department of Emergency Medicine, Qilu Hospital, Shandong University, 107 Wenhua Xi Road, Ji'nan, China 250012. E-mail

E-mail Address: [email protected]

https://orcid.org/0000-0002-4670-3727

Department of Emergency Medicine, Chest Pain Center, Shandong Provincial Clinical Research Center for Emergency and Critical Care Medicine, Institute of Emergency and Critical Care Medicine of Shandong University, Key Laboratory of Emergency and Critical Care Medicine of Shandong Province, Key Laboratory of Cardiopulmonary-Cerebral Resuscitation Research of Shandong Province, Shandong Provincial Engineering Laboratory for Emergency and Critical Care Medicine, The Key Laboratory of Cardiovascular Remodeling and Function Research affiliated to Chinese Ministry of Education and Chinese Ministry of Health and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Qilu Hospital, Shandong University, Ji’nan, China (X.X., J. Zheng, W.Z., C.P., C.W., J. Zhang, Y.B., J.M., K.C., R.L., Y.Z., Y.C., F.X.).