Xin-Miao Du1, Hai Hu2, Ofisha-Mary Kurbah3. 1. Department of Laboratory Medicine/Clinical Research Center of Laboratory Medicine, West China Hospital, Sichuan University, PR China; Respiratory and Critical Care Medicine Department, West China Hospital, Sichuan University, PR China. 2. Emergency Department, West China Hospital, Sichuan University, PR China. Electronic address: whowasyoung@126.com. 3. West China School of Medicine, Sichuan University, PR China.