[1] Baylor Coll Med, Sect Emergency Med, Houston, TX 77030 USA
[2] Baylor Coll Med, Infect Dis Sect, Houston, TX 77030 USA
[3] Baylor Coll Med, Dept Pediat, Houston, TX 77030 USA
[4] Texas Childrens Hosp, Diagnost Virol Lab, Houston, TX 77030 USA
[5] City Houston Emergency Med Serv, Houston, TX USA