Bossone, Eduardo, Rodolfo Citro, Alberto Ruggiero, Bettina Kuersten, Giovanni Gregorio, Francesco Blasi, and Luigi Allegra. 2016. “Echocardiography and Pulmonary Arterial Hypertension”. Monaldi Archives for Chest Disease 68 (4). https://doi.org/10.4081/monaldi.2007.440.