[1] Natl Inst Pediat, Clin Immunol Serv, Mexico City, DF, Mexico
[2] Natl Inst Pediat, Pneumol & Thorax Surg Dept, Mexico City, DF, Mexico
[3] Natl Inst Pediat, Dept Radiol, Mexico City, DF, Mexico
[4] Natl Inst Pediat, Dept Pathol, Insurgentes 3700 C Insurgentes Cuicuilco Coyoca, Mexico City 04530, DF, Mexico
[5] Natl Inst Pediat, Dept Genet, Mexico City, DF, Mexico
[6] Natl Inst Pediat, Immunodeficiency Res Unit, Mexico City, DF, Mexico