TY - JOUR T1 - PROCEEDINGS OF THE CARDIAC SOCIETY OF GREAT BRITAIN AND IRELAND JF - British Heart Journal JO - Heart SP - 174 LP - 179 DO - 10.1136/hrt.4.4.174 VL - 4 IS - 4 A2 - , Y1 - 1942/10/01 UR - http://heart.bmj.com/content/4/4/174.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -