1. Centers for Disease Control and Prevention, Atlanta, Georgia, and U.S. Public Health Service, Rockville, Maryland (S.G., J.W., A.M.F., L.K., F.P.H.)
2. Centers for Disease Control and Prevention and General Dynamics Information Technology, Atlanta, Georgia (K.P., O.A.)
3. Centers for Disease Control and Prevention, Atlanta, Georgia (H.P., M.W., A.O., J.M., C.T., A.H.)
4. California Emerging Infections Program, Oakland, California (P.D.K., A.R.)
5. Colorado Department of Public Health and Environment, Denver, Colorado (B.K., R.H.)
6. Connecticut Emerging Infections Program, Yale School of Public Health, New Haven, Connecticut (K.Y., A.M.)
7. Emory University School of Medicine and Georgia Emerging Infections Program, Georgia Department of Health, Atlanta, Georgia (E.J.A.)
8. Georgia Emerging Infections Program, Georgia Department of Health, Atlanta, Georgia (K.P.O.)
9. Iowa Department of Public Health, Des Moines, Iowa (A.W., K.T.)
10. Maryland Department of Health, Baltimore, Maryland (P.A.R., M.L.M.)
11. Michigan Department of Health and Human Services, Lansing, Michigan (L.R., S.K.)
12. Minnesota Department of Health, St. Paul, Minnesota (K.C., E.B.)
13. New Mexico Department of Health, Santa Fe, New Mexico (S.S.D., N.E.)
14. New York State Department of Health, Albany, New York (A.M., G.B.)
15. University of Rochester School of Medicine and Dentistry, Rochester, New York (N.M.B., C.B.F.)
16. Ohio Department of Health, Columbus, Ohio (L.B., J.S.)
17. Oregon Health Authority, Portland, Oregon (M.S., N.A.)
18. Vanderbilt University School of Medicine, Nashville, Tennessee (H.K.T., W.S.)
19. Salt Lake County Health Department, Salt Lake City, Utah (M.H., R.C.).