title: Letter: Ear, Janeu, and heart.
mesh_terms: D001314:Auscultation / Q000009:adverse effects; D004423:Ear / Q000294:innervation; D006321:Heart / Q000294:innervation; D006801:Humans; D007223:Infant; D008297:Male; D008722:Methods; D013614:Tachycardia, Paroxysmal / Q000209:etiology* / Q000517:prevention & control