Letter: Injudicious first-aid.
D004501:Education, Medical; D005260:Female; D005392:First Aid; D050723:Fractures, Bone / Q000209:etiology; D006331:Heart Diseases / Q000209:etiology; D006336:Heart Massage / Q000009:adverse effects*; D006801:Humans; D008875:Middle Aged; D012272:Ribs