Airao, B. B., Savalia, P. J., & Chaudhary, R. V. (2018). Clomiphene citrate alone versus combined metformin and clomiphene citrate versus combined metformin and clomiphene citrate and drilling versus metformin alone in infertile Indian women with PCOS: a prospective cross-sectional study. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 7(4), 1527–1531. https://doi.org/10.18203/2320-1770.ijrcog20181349