[1] Univ Sonora, Dept Ciencias Quim Biol, Hermosillo 83000, Sonora, Mexico
[2] Univ Nacl Autonoma Mexico, Fac Med, Mexico City 06726, DF, Mexico
[3] Hosp Pediat Mexico City, Ctr Med Siglo 21 IMSS, Unidad Invest Med Enfermedades Infecciosas & Para, Mexico City 06720, DF, Mexico
[4] Hosp Gen Estado Dr Roberto Ranos Bours, Dept Med Interna, Hermosillo 83000, Sonora, Mexico
[5] Hosp Infantil Estado Sonora, Serv Urgencias, Hermosillo 83100, Sonora, Mexico
[6] Hosp Infantil Estado Sonora, Serv Infectol, Hermosillo 83100, Sonora, Mexico
[7] Univ Nacl Autonoma Mexico, Fac Med, Dept Expt Med, Mexico City 06726, DF, Mexico