[1] Yale Univ, Sch Publ Hlth, Connecticut Emerging Infect Program, New Haven, CT USA
[2] CDC, Influenza Div, Natl Ctr Immunizat & Resp Dis, Atlanta, GA 30333 USA
[3] Emory Univ, Sch Med, Dept Pediat, Atlanta, GA USA
[4] Emory Univ, Sch Med, Dept Med, Atlanta, GA USA
[5] Atlanta Vet Affairs Med Ctr, Atlanta, GA USA
[6] New Mexico Dept Hlth, Santa Fe, NM 87505 USA
[7] Michigan Dept Hlth & Human Serv, Div Communicable Dis, Highland Pk, MI 48203 USA
[8] Salt Lake Cty Hlth Dept, Salt Lake City, UT USA
[9] Maryland Dept Hlth & Mental Hyg, Baltimore, MD 21201 USA
[10] Oregon Hlth Author, Oregon Publ Hlth Div, Portland, OR USA
[11] Vanderbilt Univ, Sch Med, Dept Hlth Policy, Dept Pediat, Nashville, TN 37212 USA
[12] Ohio Dept Hlth, Columbus, OH 43266 USA
[13] Rhode Isl Dept Hlth, Providence, RI 02908 USA
[14] Colorado Dept Publ Hlth & Environm, Denver, CO USA
[15] Virginia Dept Hlth, Henrico, VA USA
[16] Calif Emerging Infect Program, Atlanta, GA USA
[17] New York State Dept Hlth, New York Emerging Infect Program, Albany, NY 12237 USA