[1] Univ Nacl Autonoma Mexico, Mexico City, DF, Mexico
[2] Medica Clin Fdn, Liver Res Unit, Mexico City 14050, DF, Mexico
[3] Medica Clin Fdn, Dept Pediat, Medica Clin, Mexico City 14050, DF, Mexico
[4] Hosp Infantil Mexico Dr Federico Gomez, Dept Educ, Mexico City, DF, Mexico
[5] Hosp Infantil Mexico Dr Federico Gomez, Dept Endocrinol, Mexico City, DF, Mexico