title: Cytogenetic studies on primary thrombocythaemia.
mesh_terms: D000328:Adult; D000368:Aged; D002869:Chromosome Aberrations; D002871:Chromosome Banding; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013922:Thrombocytosis / Q000235:genetics*; D013997:Time Factors