title: Origin of trisomy 12 in B-cell chronic lymphocytic leukemia.
mesh_terms: D002881:Chromosomes, Human, Pair 12; D005819:Genetic Markers; D006801:Humans; D007945:Leukemia, Lymphoid / Q000235:genetics*; D014314:Trisomy
chemical_list: D005819:Genetic Markers