[1] Hosp Infantil Mexico Dr Federico Gomez, Unidad Invest Enfermedades Infecciosas, Dr Marquez 162, Mexico City 06720, DF, Mexico
[2] Univ Nacl Autonoma Mexico, Unidad Perifer Invest Basica & Clin Enfermedades, Dr Marquez 162, Mexico City 06720, DF, Mexico
[3] Univ Nacl Autonoma Mexico, Fac Med, Dept Salud Publ, Div Invest, Mexico City 04510, DF, Mexico
[4] Hosp Infantil Mexico Dr Federico Gomez, Dept HematoOncol, Dr Marquez 162, Mexico City 06720, DF, Mexico