TY - JOUR T1 - PROCEEDINGS OF THE CARDIAC SOCIETY OF GREAT BRITAIN AND IRELAND JF - British Heart Journal JO - Heart SP - 233 LP - 238 DO - 10.1136/hrt.8.4.233 VL - 8 IS - 4 A2 - , Y1 - 1946/10/01 UR - http://heart.bmj.com/content/8/4/233.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -