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APA Citation
Choo, J., Yap, J., Ismail, A., Lim, C. L., Sumathy, P., Ruan, W., Sewa, D. W., Phua, G. C., Hong, C., Low, A. H. L., Lim, S. T., & Tan, J. L. (n.d.). intravenous epoprostenol therapy in the treatment of pulmonary arterial hypertension: the Singapore experience. European heart journal, 43, . http://access.bl.uk/ark:/81055/vdc_100150545104.0x00004f