B. Shetty, M., B. M., K., Malyala, M., Swarup, A., Pathadan, D. S., & Pocha, S. (2017). Preterm birth: associated risk factors and outcome in tertiary care center. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 6(8), 3271–3274. https://doi.org/10.18203/2320-1770.ijrcog20173258