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APA Citation
Yoshii, W. Y., Kotelko, D. M., Rasmus, K. T., Miller, M., Wright, W. C., Rosen, P. J., Rottman, R. L., & Stone, J. J. (1993). fentanyl for Epidural Intravascular Test Dose in Obstetrics. Regional anesthesia, 18(5), 296–299. http://access.bl.uk/ark:/81055/vdc_100144236424.0x000050