[1] Brigham & Womens Hosp, Dept Med, Boston, MA 02115 USA
[2] Harvard Univ, Sch Med, Boston, MA USA
[3] Univ Texas Houston, Sch Biomed Informat, Houston, TX USA
[4] Univ Texas Houston, Mem Hermann Ctr Healthcare Qual & Safety, Houston, TX USA
[5] Indiana Univ, Dept Knowledge Informat & Translat, Indianapolis, IN 46204 USA
[6] Oregon Hlth & Sci Univ, Dept Med Informat & Clin Epidemiol, Portland, OR 97201 USA
[7] Univ Vermont, Dept Med, Burlington, VT USA