[1] Childrens Hosp, Div Infect Dis, Boston, MA 02115 USA
[2] Childrens Hosp, Div Gen Pediat, Boston, MA 02115 USA
[3] Childrens Hosp, Dept Med, Div Emergency Med, Boston, MA 02115 USA
[4] Childrens Hosp, Informat Serv Dept, Boston, MA 02115 USA
[5] Harvard Univ, Sch Publ Hlth, Dept Hlth Policy & Management, Boston, MA 02115 USA
[6] Brigham & Womens Hosp, Div Gen Med, Boston, MA 02115 USA
[7] Veterans Affairs Boston Healthcare Syst, Boston, MA USA