Stefanantoni, K. et al. 2015. Elevated serum levels of macrophage migration inhibitory factor and stem cell growth factor β in patients with idiopathic and systemic sclerosis associated pulmonary arterial hypertension. Reumatismo. 66, 4 (Mar. 2015), 270–276. DOI:https://doi.org/10.4081/reumatismo.2014.774.