C Esparza, A Romero, R Mendez, A Serrano, M Jurado, P Jimenez, F Ruiz-Cabello. Expansion of cells with trisomy 12 associated with progressive lymphocytosis and a dramatic change in chimera status in a patient with chronic lymphocytic leukemia. Haematologica 2002;87(7):ECR25-ECR25; https://doi.org/10.3324/%x.