P6341Haemodynamic and exercise effects of different types of initial oral combination therapy in pulmonary arterial hypertension. (28th August 2018) - Rinaldi, A; Dardi, F; Albini, A; Gotti, E; Monti, E; Palazzini, M; Zuffa, E; Guarino, D; Pasca, F; De Lorenzis, A; Orzalkiewicz, M; Manes, A; et al.