[1] Harvard Univ, Sch Med, Boston, MA 02115 USA
[2] Harvard Pilgrim Hlth Care Inst, Boston, MA USA
[3] HealthCore, Wilmington, DE USA
[4] I3 Drug Safety, Waltham, MA USA
[5] Brookings Inst, Engelberg Ctr Hlth Care Reform, Washington, DC 20036 USA
[6] IBM Corp, Fairfax, VA USA