title: A doctor's dilemma over an electrocardiographic lead 3 before the days of lead 3R. An interpretation of historic importance (Prime Minister Baldwin and Dr. William Evans).
mesh_terms: D002309:Cardiology / Q000266:history*; D004562:Electrocardiography / Q000266:history*; D004739:England; D005197:Famous Persons; D049673:History, 20th Century; D006801:Humans; D008297:Male; D013008:Somatotypes