[1] Boston Childrens Hosp, Div Adolescent Young Adult Med, Boston, MA 02115 USA
[2] Boston Childrens Hosp, Off Community Hlth, Boston, MA USA
[3] Boston Childrens Hosp, Div Emergency Med, Boston, MA USA
[4] Boston Childrens Hosp, Med Patient Serv, Boston, MA USA
[5] Boston Childrens Hosp, Gen Pediat, Boston, MA USA
[6] CDC, Natl Ctr Chron Dis Prevent & Hlth Promot, Div Community Hlth, Atlanta, GA 30333 USA