[1] Ctr Dis Control & Prevent, Natl Ctr Immunizat & Resp Dis, 1600 Clifton Rd NE,Mail Stop H24-4, Atlanta, GA 30329 USA
[2] Ctr Dis Control & Prevent, Ctr Global Hlth, Atlanta, GA 30329 USA
[3] Ctr Dis Control & Prevent, Natl Ctr Hlth Stat, Atlanta, GA 30329 USA
[4] Leidos Inc, Atlanta, GA USA