[1] Brigham & Womens Hosp, Dept Med, Div Gen Internal Med, Boston, MA 02115 USA
[2] Harvard Med Sch, Dept Med, Boston, MA 02115 USA
[3] Univ Florida, Coll Med, Dept Hlth Outcomes & Biomed Informat, Gainesville, FL 32611 USA
[4] Univ Arkansas Med Sci, Coll Med, Dept Biomed Informat, Little Rock, AR 72205 USA
[5] Univ Florida, Coll Med, Dept Pathol Immunol & Lab Med, Gainesville, FL 32610 USA
[6] Univ Florida, Coll Med, Ctr Perinatal Outcomes Res, Gainesville, FL 32611 USA
[7] Univ Florida, Coll Med, Dept Obstet & Gynecol, Gainesville, FL 32610 USA