CHANGES IN RIGHT VENTRICULAR EJECTION FRACTION CORRELATE WITH CHANGES IN SIX-MINUTE WALK DISTANCE IN BOSENTAN-TREATED PATIENTS WITH PULMONARY ARTERIAL HYPERTENSION
1987 ◽
Vol 8
(3)
◽
pp. 297-307
◽
2013 ◽
Vol 15
(1)
◽
pp. 18-23
◽