[1] Fac Med UNAM, Mexico City, DF, Mexico
[2] Inst Ophthalmol Conde de Valenciana, Dept Immunol, Mexico City, DF, Mexico
[3] Inst Ophthalmol Conde de Valenciana, Res Unit, Mexico City, DF, Mexico
[4] IPN, Escuela Nacl Ciencias Biol, Mexico City 07738, DF, Mexico