[1] Univ Sao Paulo, Inst Biomed Sci, Sao Paulo, Brazil
[2] Univ Fed Sao Paulo, Dept Pediat, Sao Paulo, Brazil
[3] Fed Dist Base Hosp, Brasilia, DF, Brazil
[4] Childrens Hosp Lucidio Portella, Teresina, Brazil
[5] Albert Sabin Infantile Hosp, Fortaleza, Ceara, Brazil
[6] Univ Estadual Campinas, Dept Clin Med, Fac Med Sci, Campinas, SP, Brazil
[7] Univ Sao Paulo, Dept Pediat, Sch Med Ribeirao Preto, BR-14049 Ribeirao Preto, Brazil
[8] Hosp Necker Enfants Malad, INSERM, U768, Paris, France