[1] Johns Hopkins Bloomberg Sch Publ Hlth, Ctr Populat Hlth IT, Dept Hlth Policy & Management, Baltimore, MD 21205 USA
[2] Johns Hopkins Bloomberg Sch Publ Hlth, Ctr Drug Safety & Effectiveness, Baltimore, MD 21205 USA
[3] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Epidemiol, Baltimore, MD 21205 USA
[4] Johns Hopkins Univ Hosp, Ctr Medicat Qual & Outcome, Baltimore, MD 21287 USA
[5] Johns Hopkins Bloomberg Sch Publ Hlth, Ctr Populat Hlth IT, Baltimore, MD 21205 USA
[6] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Hlth Policy & Management, Baltimore, MD 21205 USA
[7] Johns Hopkins Sch Med, Div Hlth Sci & Informat, Baltimore, MD USA