[1] C Nacl Invest Oncol, Cytogenet Unit & Human Genet, Madrid, Spain
[2] Hosp Gen Gregorio Maranon, Banco Sangre, Madrid, Spain
[3] Mem Sloan Kettering Canc Ctr, Lab Mol Aspects Hematopoiesis, New York, NY 10021 USA
[4] C Nacl Invest Oncol, Monoclonal Antibody Unit, Madrid, Spain