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APA Citation
Heath, D., Smith, P., Gosney, J., Mulcahy, D., Fox, K., Yacoub, M., & Harris, P. (1987). the pathology of the early and late stages of primary pulmonary hypertension.. Heart, 58(3), 204–213. http://access.bl.uk/ark:/81055/vdc_100144737948.0x000041