[1] NYU, Sch Med, New York, NY USA
[2] Genom Hlth Inc, Redwood City, CA USA
[3] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA 90095 USA
[4] RAND Corp, Pardee RAND Grad Sch, Santa Monica, CA USA
[5] Partnership Hlth Analyt Res, Beverly Hills, CA USA