title: Writer's cramp: a prospective study of 53 Nigerian Africans.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009120:Muscle Cramp / Q000503:physiopathology* / Q000523:psychology; D009549:Nigeria; D009784:Occupational Diseases / Q000503:physiopathology*; D014956:Writing