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1 Harvard Medical School, Boston, Massachusetts (S.S., M.L.).
2 Social Interventions Research and Evaluation Network, University of California, San Francisco, San Francisco, California (L.M.G.).
3 HealthBegins, Pasadena, California; Department of Health Systems Science, Kaiser Permanente Bernard J. Tyson School of Medicine, Pasadena, California; and School of Global Health, Meharry Medical College, Nashville, Tennessee (R.M.).
1 Harvard Medical School, Boston, Massachusetts (S.S., M.L.).
2 Social Interventions Research and Evaluation Network, University of California, San Francisco, San Francisco, California (L.M.G.).
3 HealthBegins, Pasadena, California; Department of Health Systems Science, Kaiser Permanente Bernard J. Tyson School of Medicine, Pasadena, California; and School of Global Health, Meharry Medical College, Nashville, Tennessee (R.M.).