[1] Univ Autonoma Coahuila, Fac Med, Ctr Invest Biomed, Dept Inmunobiol Mol, Torreon 27000, Coahuila, Mexico
[2] Royal Free Hosp, Sch Med, Anthony Nolan Res Inst, London, England
[3] CMNO IMSS, Ctr Invest Biomed Occidente, Div Genet, Guadalajara, Jalisco, Mexico