[1] Hosp Pediat Dr Silvestre FrenkFreund, Dept Neurol, Unidad Med Alta Especialidad, Ctr Med Nacl Siglo XXI, Mexico City, DF, Mexico
[2] IMSS, Mexico City, DF, Mexico
[3] Hosp Infantil Mexico Dr Federico Gomez, Dept Neurol, Mexico City, DF, Mexico
[4] Hosp Infantil Mexico Dr Federico Gomez, Dept Oncol, Unidad Hematooncol, Mexico City, DF, Mexico
[5] Univ Autonoma Tamaulipas, Dept Invest, Fac Med Tampico Dr Alberto RomoCaballero, Tampico, Tamaulipas, Mexico
[6] CognitiveScience SA, Mexico City, DF, Mexico