title: Factors affecting manual white cell differential counts.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007962:Leukocytes / Q000032:analysis*; D008297:Male; D008722:Methods; D008875:Middle Aged; D012737:Sex Factors