Sara E. Luckhaupt , Marie Haring Sweeney, Renee Funk, Geoffrey M. Calvert, Mackenzie Nowell¹, Tiffany D’Mello, Arthur Reingold, James Meek, Kimberly Yousey-Hindes, Kathryn E. Arnold, Patricia Ryan, Ruth Lynfield, Craig Morin, Joan Baumbach, Shelley Zansky, Nancy M. Bennett, Ann Thomas, William Schaffner, and Timothy Jones

Author affiliations: Centers for Disease Control and Prevention, Cincinnati, Ohio, USA (S.E. Luckhaupt, M. H. Sweeney, G.M. Calvert); Centers for Disease Control and Prevention, Atlanta, Georgia, USA (R. Funk, M. Nowell, T. D’Mello); University of California, Berkeley, California, USA (A. Reingold); Yale University, New Haven, Connecticut, USA (J. Meek, K. Yousey-Hindes); Georgia Division of Public Health, Atlanta (K. E. Arnold); Maryland Department of Health and Mental Hygiene, Baltimore, Maryland, USA (P. Ryan),; Minnesota Department of Health, Minneapolis, Minnesota, USA (R. Lynfield, C. Morin); New Mexico Department of Health, Santa Fe, New Mexico, USA (J. Baumbach); New York State Department of Health, Albany, New York, USA (S. Zansky); University of Rochester, Rochester, New York, USA (N. M. Bennett); Oregon Public Health Division, Portland, Oregon, USA (A. Thomas); Vanderbilt University, Nashville, Tennessee, USA (W. Schaffner); Tennessee Department of Health, Nashville (T. Jones)