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Berger RM, Beghetti M, Humpl T, Raskob GE, Ivy DD, Jing ZC, et al. Clinical features of paediatric pulmonary hypertension: A registry study. <i>Lancet<\/i> 2012; 379: 537\u2013546.","DOI":"10.1016\/S0140-6736(11)61621-8"},{"key":"8","doi-asserted-by":"crossref","unstructured":"8. Saji T. Update on pediatric pulmonary arterial hypertension: Differences and similarities to adult disease. <i>Circ J<\/i> 2013; 77: 2639\u20132650.","DOI":"10.1253\/circj.CJ-13-1180"},{"key":"9","doi-asserted-by":"crossref","unstructured":"9. Sitbon O, Channick R, Chin KM, Frey A, Gaine S, Galie N, et al. Selexipag for the treatment of pulmonary arterial hypertension. <i>N Engl J Med<\/i> 2015; 373: 2522\u20132533.","DOI":"10.1056\/NEJMoa1503184"},{"key":"10","doi-asserted-by":"crossref","unstructured":"10. Ivy DD, Abman SH, Barst RJ, Berger RM, Bonnet D, Fleming TR, et al. 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