title: Bone marrow aspiration with a 22-gauge spinal needle.
mesh_terms: D000293:Adolescent; D001707:Biopsy, Needle / Q000295:instrumentation* / Q000379:methods; D001853:Bone Marrow / Q000473:pathology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D010146:Pain / Q000517:prevention & control