title: The Frank vectorcardiogram in coal miners' pneumoconiosis.
mesh_terms: D000328:Adult; D000368:Aged; D001794:Blood Pressure; D006332:Cardiomegaly / Q000175:diagnosis*; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D008875:Middle Aged; D008906:Mining; D011009:Pneumoconiosis / Q000150:complications*; D011651:Pulmonary Artery; D013223:Statistics as Topic; D014672:Vectorcardiography