Casali, Lucio, Pierluigi Carratù, and Matteo Sofia. “Clinical Variability of Respiratory Pulmonary Hypertension: Implications for Diagnosis and Management”. Multidisciplinary Respiratory Medicine 8, no. 9 (November 26, 2013). Accessed May 19, 2025. https://mrmjournal.org/index.php/mrm/article/view/584.