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APA Citation
Clements, P. J., Tan, M., McLaughlin, V. V., Oudiz, R. J., Tapson, V. F., Channick, R. N., Rubin, L. J., & Langer, A. (2012). the pulmonary arterial hypertension quality enhancement research initiative: comparison of patients with idiopathic PAH to patients with systemic sclerosis-associated PAH. Annals of the rheumatic diseases, 71(2), 249–252. http://access.bl.uk/ark:/81055/vdc_100135164750.0x000055