title: Training of physicians and technicians.
mesh_terms: D000328:Adult; D002309:Cardiology / Q000193:education*; D002648:Child; D004452:Echocardiography / Q000295:instrumentation / Q000379:methods / Q000592:standards*; D006331:Heart Diseases / Q000175:diagnosis*; D006801:Humans; D010701:Phonocardiography