[1
]Payer?+?Provider Syndicate, Boston, Massachusetts
[2
]Harvard Medical School, Boston, Massachusetts3Brigham and Women’s Hospital, Boston,
Massachusetts4Partners Information Systems, Wellesley, Massachusetts
[3
]Harvard Medical School, Boston, Massachusetts3Brigham and Women’s Hospital, Boston,
Massachusetts4Partners Information Systems, Wellesley, Massachusetts5Harvard School
of Public Health, Boston, Massachusetts