[1] Emory Univ, Sch Med, Dept Pediat, Atlanta, GA USA
[2] Childrens Healthcare Atlanta, Atlanta, GA USA
[3] Morehouse Sch Med, Atlanta, GA 30310 USA
[4] Grady Hlth Syst, Ponce Family & Youth Clin, Grady Infect Dis Program, Atlanta, GA USA
[5] Univ Florida, Dept Emergency Med, 1329 SW 16th St,POB 100186, Gainesville, FL 32610 USA
[6] Univ Miami, Miller Sch Med, Dept Emergency Med, Jackson Mem Hosp, Miami, FL 33136 USA
[7] Univ Washington, Dept Pediat, Seattle, WA 98195 USA
[8] Univ Colorado, Boulder, CO 80309 USA
[9] Univ Arizona, Coll Med, Phoenix, AZ USA