TY - JOUR T1 - ABSTRACTS OF CARDIOLOGY JF - British Heart Journal JO - Heart SP - 417 LP - 424 DO - 10.1136/hrt.17.3.417 VL - 17 IS - 3 A2 - , Y1 - 1955/07/01 UR - http://heart.bmj.com/content/17/3/417.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -