1 Department of Intensive Care Unit, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
2 Department of Intensive Care Unit, Peking University Cancer Hospital, Beijing, China.
3 Department of Intensive Care Unit, Beijing Shijitan Hospital, Capital Medical University, Beijing, China.
4 Department of Intensive Care Unit, Hebei General Hospital, Hebei, China.
5 Department of Internal Medicine, Chinese PLA General Hospital, Beijing, China.
6 Department of Intensive Care Unit, Peking University First Hospital, Beijing, China.
7 Department of Intensive Care Unit, China-Japan Friendship Hospital, Beijing, China.
8 Department of Intensive Care Unit, Tianjin Medical University General Hospital, Tianjin, China.
9 Department of Intensive Care Unit, Tianjin Medical University Cancer Institute & Hospital, Tianjin, China.
10 Department of Intensive Care Unit, Beijing Children's Hospital, Capital Medical University, Beijing, China.
11 Department of Intensive Care Unit, Aerospace Corporation Central Hospital of China, Beijing, China.
12 Department of Intensive Care Unit, Civil Aviation General Hospital, Beijing, China.
13 Department of Intensive Care Unit, Affiliated Hospital of Chengde Medical University, Chengde, China.
14 Department of Intensive Care Unit, Beijing Haidian Hospital, Beijing, China.
15 Department of Intensive Care Unit, Beijing Coal Group General Hospital, Beijing, China.
16 Department of Intensive Care Unit, Peking Union Medical College Hospital, Beijing, China.
17 Department of Intensive Care Unit, Fifth Medical Center of the PLA General Hospital, Beijing, China.
18 Department of Intensive Care Unit, Beijing Chest Hospital, Capital Medical University, Beijing, China.