title: [Seasonal indices of hematological studies in blood donors].
mesh_terms: D000293:Adolescent; D000328:Adult; D001782:Blood Donors; D006400:Hematocrit; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D007958:Leukocyte Count; D008297:Male; D008875:Middle Aged; D012621:Seasons
chemical_list: D006454:Hemoglobins
vernacular_title: Sezonowe wskaźniki badań hematologicznych u krwiodawców.