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Williams RS, Gaines IL, Fossum GT. Progesterone in diagnosis of ectopic pregnancy. J Fla Med Assoc. 1992;79(4):237-9
Williams, R. S., Gaines, I. L., & Fossum, G. T. (1992). Progesterone in diagnosis of ectopic pregnancy. The Journal of the Florida Medical Association, 79(4), 237-9.
Williams, R S, et al. "Progesterone in diagnosis of ectopic pregnancy." The Journal of the Florida Medical Association vol. 79,4 (1992): 237-9.
Williams RS, Gaines IL, Fossum GT. Progesterone in diagnosis of ectopic pregnancy. J Fla Med Assoc. 1992 Apr;79(4):237-9. PMID: 1588295.
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