title: Does the monthly frequency of medullary aplasia vary throughout the year? An analysis of the Cooperative Group Study of Aplastic and Refractory Anemias.
mesh_terms: D000328:Adult; D000741:Anemia, Aplastic / Q000453:epidemiology*; D005060:Europe; D006801:Humans; D012189:Retrospective Studies; D012621:Seasons