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28. Pelvic organ prolapse in counties of different economy: a systematic review. Paudel S, Chalise A. Dangal G, Bhandari TR, Baral G,. Nep J Obstet Gynecol 2019;14(29):7-21 

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30. A qualitative evidence synthesis using meta-ethnographic to understand the experience of living with pelvic organ prolapse. Toye F, Pearl J, Vincent K, Barker K. Int Urogynecology Journal 2020