TY - JOUR T1 - Primary pulmonary hypertension. JF - British Heart Journal JO - Heart SP - 517 LP - 521 DO - 10.1136/hrt.49.6.517 VL - 49 IS - 6 AU - S G Haworth Y1 - 1983/06/01 UR - http://heart.bmj.com/content/49/6/517.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -