Author Contributions: Dr Phares had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Phares, Lynfield, Mohle-Boetani, Schaffner, Stefonek, Schuchat, Schrag.
Acquisition of data: Lynfield, Farley, Harrison, Petit, Craig, Schaffner, Zansky, Gershman, Stefonek, Albanese.
Analysis and interpretation of data: Phares, Lynfield, Farley, Mohle-Boetani, Harrison, Schaffner, Zansky, Albanese, Zell, Schuchat,
Drafting of the manuscript: Phares, Schrag.
Critical revision of the manuscript for important intellectual content: Lynfield, Farley, Mohle-Boetani, Harrison, Petit, Craig, Schaffner, Zansky, Gershman, Stefonek, Albanese, Zell, Schuchat, Schrag.
Statistical analysis: Phares, Zansky, Zell.
Obtained funding: Farley, Zansky, Stefonek, Schuchat.
Administrative, technical, or material support: Lynfield, Farley, Harrison, Craig, Schaffner, Stefonek,
Albanese, Schuchat, Schrag.
Study supervision: Farley, Craig, Schaffner, Gershman, Albanese, Schuchat, Schrag.
Financial Disclosures: None reported.
Funding/Support: This study was supported by the Centers for Disease Control and Prevention's Emerging Infections Program, the Antimicrobial Resistance Working Group of the National Center for Infectious Diseases, and the National Vaccine Program Office.
Role of the Sponsors: Neither the study sponsors nor any commercial entity had any role in the design and conduct of the study; the collection, management, analysis, or interpretation of the data; or the preparation, review, or approval of the manuscript.
Active Bacterial Core surveillance/Emerging Infections Program Network Personnel: Pamala Daily, MPH (California Emerging Infections Program, Oakland); Steve Burnite, Allison Daniels, MSPH, Nicole Haubert, MSPH (Colorado Department of Public Health and Environment); Nancy Barrett, MS, MPH, Zack Fraser, James L. Hadler, MD, MPH (Connecticut Department of Public Health, Emerging Infections Program, Hartford); Kathryn E. Arnold, MD (Division of Public Health, Georgia Department of Human Resources); Pat Martell-Cleary, MSW (Georgia Emerging Infections Program); Laurie Thomson Sanza, RN (Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland); Patricia Ferrieri, MD, Aurea Flores, PhD (University of Minnesota); John Besser, MS, Richard Danila, PhD, Anita Glennen, Brenda Jewell, Susan Johnson, Billie Juni, MS, Craig Morin, MPH, Jean Rainbow, RN, MPH, Lori Triden (Minnesota Department of Health); Joseph Bareta, MS, Kathy Angeles, MPH, Karen Johnson, MS, Joanne Keefe, MPH, Lisa Butler, BUS (New Mexico Department of Health Emerging Infections Program, Santa Fe); Nancy Spina, Glenda Smith (New York State Emerging Infections Program); Margaret Dragoon, RN, MPH, Dana Farland, RN, Anna Zeigler, RN (Multnomah County Health Department, Portland, Oregon); Brenda G. Barnes, RN (Department of Preventive Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee); Timothy Bailiff, Sheila Bashirian, Gloria Carvalho, John Elliott, PhD, Richard Facklam, PhD, Joy Findley, Alma Franklin, Genny Gallagher, PhD, Delois Jackson, Patricia Shewmaker, PhD, Tami Skoff, MS, Chris Van Beneden, MD, MPH, Shantia Warren, Emily Weston, MPH, Cynthia Whitney, MD, MPH, Carolyn Wright (Centers for Disease Control and Prevention). None of these individuals received compensation for their contributions.