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APA Citation
Dahiya, P., Dalal, M., Yadav, A., Dahiya, K., Jain, S., & Silan, V. (n.d.). efficacy of combined hormonal vaginal ring in comparison to combined hormonal pills in heavy menstrual bleeding. European journal of obstetrics, gynecology, and reproductive biology, 203, 147–151. http://access.bl.uk/ark:/81055/vdc_100034881800.0x000016