Changes in cellular lineage in the relapses of acute lymphocytic leukemia: Frequency, morphological, phenotypical and cytogenetical features, and clinical evolution

1. Del Potro, E.
2. Diaz Mediavilla, J.
3. Ferro, M.T.
4. Jorda, J.
5. Alvarez, A.
6. Villegas, A.
7. Espinos, D.