Philadelphia chromosome studies of mailed-in blood samples.
D001793:Blood Preservation; D002478:Cells, Cultured; D002869:Chromosome Aberrations; D006801:Humans; D007621:Karyotyping; D007951:Leukemia, Myeloid / Q000175:diagnosis*; D007958:Leukocyte Count; D007962:Leukocytes; D008722:Methods