TY - JOUR AU - Macchia, A; Marchioli, R; Tognoni, G TI - Systematic review of trials using vasodilators in pulmonary arterial hypertension: why a new approach is needed JO - Am Heart J VL - 159 PY - 2010 DO - 10.1016/j.ahj.2009.11.028 L3 - PubMed-ID: 20152223 SP - 245 EP - 257 N1 - et al. ER -