William M. Duck*, Jeremy Sobel*, Janet M. Pruckler*, Qunsheng Song*, David Swerdlow*, Cindy Friedman*, Alana Sulka*, Balasubra Swaminathan*, Tom Taylor*, Mike Hoekstra*, Patricia M. Griffin*, Duane Smoot†, Rick Peek‡, DavidC. Metz§, Peter B. Bloom¶, Steven Goldschmid¶, Julie Parsonnet#, George Triadafilopoulos#, Guillermo I. Perez-Perez**, Nimish Vakil††, Peter Ernst‡‡, Steve Czinn§§, Donald Dunne§§, and Ben D. Gold*

Author affiliations: *Centers for Disease Control and Prevention, Atlanta, Georgia, USA; †Howard University Medical Center, Washington, DC, USA; ‡Vanderbilt University Medical Center, Nashville, Tennessee, USA; §University of Pennsylvania Medical Center, Philadelphia, Pennsylvania, USA; ¶Atlanta Veterans Affairs Medical Center, Atlanta, Georgia, USA; #Stanford University Medical Center, Palo Alto, California, USA; **New York University School of Medicine, New York, New York, USA; ††Sinai Samaritan Medical Center, Milwaukee, Wisconsin, USA; ‡‡University of Virginia, Charlottesville, Virginia, USA; §§University Hospitals of Cleveland, Cleveland, Ohio, USA; ¶¶Indiana University Medical Center, Indianapolis, Indiana, USA