[1] Univ Nacl Autonoma Mexico, Ciencias Biol, Programa Doctorado, Mexico City 04510, DF, Mexico
[2] Inst Nacl Med Genom, Lab Genom Canc, Mexico City 14610, DF, Mexico
[3] UMAE Hosp Pediat Dr Silvestre Frenk Freund, Unidad Invest Med Epidemiol Clin, Ctr Med Nacl Siglo 21, Inst Mexicano Seguro Social, Mexico City 06720, DF, Mexico
[4] Hosp Juarez Mexico, Unidad Invest Enfermedades Metab & Endocrinas, Mexico City 07760, DF, Mexico
[5] Inst Mexicano Seguro Social, Coordinac Invest Salud, Mexico City 06720, DF, Mexico