title: ECG challenge: October 22, 2013.
mesh_terms: D000368:Aged; D001991:Bronchitis / Q000175:diagnosis*; D004562:Electrocardiography / Q000379:methods*; D006331:Heart Diseases / Q000175:diagnosis*; D006801:Humans; D008297:Male; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis*