Sagoo, B., and N. Abulhassan. “Gestational Trophoblastic Disease Findings of a Five Year Period Retrospective Audit”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 4, no. 6, Feb. 2017, pp. 1887-90, doi:10.18203/2320-1770.ijrcog20151280.