Feng Chen1, Zhi-Qing Chen2, Ji-Jin Zhu1. 1. Department of Emergency, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China. 2. Department of Cardiology, Guangxi Key Laboratory Base of Precision Medicine in Cardio-cerebrovascular Diseases Control and Prevention, The First Affiliated Hospital of Guangxi Medical University, Guangxi Clinical Research Center for Cardio-cerebrovascular Diseases, Nanning, Guangxi, China.