Affiliation: | Author affiliations: Colorado State University, Fort Collins, Colorado, USA (B.D. Foy, K.C. Kobylinski);;Poudre Valley Hospital, Fort Collins (J.L.C. Foy);;Iowa State University, Ames, Iowa, USA (B.J. Blitvich);;University of Texas Medical Branch, Galveston, Texas, USA (A. Travassos da Rosa, A.D. Haddow, R.B. Tesh);;Centers for Disease Control and Prevention, Fort Collins (R.S. Lanciotti) |