text: The incidence of<unk><unk>  is approximately 4.4 to 4.6 cases per 100,000 individuals in the United States.<unk><unk>  commonly affects individuals older than 50 years of age. Males are more commonly affected with<unk><unk>  than females.<unk><unk>  usually affects individuals of the Caucasian race.
option_0: Myelodysplastic syndrome epidemiology and demographics
option_1: Acute myeloid leukemia epidemiology and demographics
option_2: Aplastic anemia epidemiology and demographics
option_3: Mast cell leukemia epidemiology and demographics
option_4: Myelofibrosis epidemiology and demographics
option_5: Chronic neutrophilic leukemia epidemiology and demographics
option_6: Chronic myelogenous leukemia epidemiology and demographics
option_7: Chronic lymphocytic leukemia epidemiology and demographics