Affiliation: | Hennepin County Medical Center, Minneapolis, Minnesota, USA (M.D. Sprenkle, W. Marinelli); ;Minnesota Department of Health, St. Paul, Minnesota, USA (J. Griffith, B.A. Juni); ;Centers for Disease Control and Prevention, Atlanta, Georgia, USA (A.E. Boyer, C.P. Quinn, N.T. Pesik, A. Hoffmaster, D.D. Blaney); ;University of Minnesota, Minneapolis (J. Keenan) |