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Conceptualized framework for levels of obstetric care.
Kweon SY, Lee SM. Kweon SY, et al. Obstet Gynecol Sci. 2018 May;61(3):289-297. doi: 10.5468/ogs.2018.61.3.289. Epub 2018 Apr 27. Obstet Gynecol Sci. 2018. PMID: 29780770 Free PMC article. Review.