[1] MIT, EECS, Cambridge, MA 02139 USA
[2] Harvard Med Sch, Radiol, Boston, MA 02115 USA
[3] MIT, CSAIL, Cambridge, MA 02139 USA
[4] Harvard Med Sch, Dept Biomed Informat, Boston, MA 02115 USA
[5] Carnegie Mellon Univ, Sch Comp Sci, Pittsburgh, PA 15213 USA
[6] Univ Penn Hlth Syst, Predict Hlth Care Grp, Philadelphia, PA USA
[7] Harvard TH Chan Sch Publ Hlth, Dept Epidemiol, Boston, MA USA
[8] Microsoft Res, Redmond, WA USA