作者单位:Harvard TH Chan Sch Publ Hlth, Int Hlth, Cambridge, MA USA[1]Harvard Med Sch, Beth Israel Deaconess Med Ctr, Emergency Med, Boston, MA 02115 USA[2]Harvard TH Chan Sch Publ Hlth, Biostat, Cambridge, MA USA[3]Harvard TH Chan Sch Publ Hlth, Cambridge, MA USA[4]NewYork Presbyterian Hosp, New York, NY USA[5]