Richard Platt*†‡ , Ken Kleinman*†, Kristin Thompson*†, Rachel S. Dokholyan*†, James M. Livingston*‡, Andrew Bergman*§, John H. Mason*#, Teresa C. Horan**, Robert P. Gaynes#, Steven L. Solomon#, and Kenneth E. Sands*††

Author affiliations: *Centers for Disease Control and Prevention Eastern Massachusetts Prevention Epicenter, Boston, Massachusetts, USA; †Harvard Medical School and Harvard Pilgrim Health Care, Boston, Massachusetts, USA; ‡Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA; §Tufts Health Plan, Boston, Massachusetts, USA; #Blue Cross Blue Shield of Massachusetts, Boston, Massachusetts, USA; **Centers for Disease Control and Prevention, Atlanta, Georgia, USA; ††Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA;