[1] Johns Hopkins Bloomberg Sch Publ Hlth, Baltimore, MD 21205 USA
[2] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Hlth Policy & Management, Baltimore, MD USA
[3] Johns Hopkins Ctr Law & Publ Hlth, Baltimore, MD USA
[4] Johns Hopkins Ctr Injury Res & Policy, Training & Educ, Baltimore, MD USA
[5] Eastern Reg Network Publ Hlth Law, Edina, MN USA
[6] Sch Inst Hlth & Social Policy, Baltimore, MD USA
[7] Johns Hopkins Ctr Injury Res & Policy, Res Core, Baltimore, MD USA