<prompt> Which of the following is not compatible with a diagnosis of juvenile myelomonocytic leukemia?Peripheral blood monocytosis, more than 1 x 107LIncreased Hemoglobin F levels for agePresence of bcrabl fusion geneGM - CSF hypersensitivity of myeloid progenitors in vitro  <response>: . Presence of bcrabl fusion gene 