title: [A preliminary study of 44 cases of myelodysplastic syndrome and proposals for its classification].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009190:Myelodysplastic Syndromes / Q000145:classification* / Q000175:diagnosis; D012189:Retrospective Studies