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Cochrane Database Syst Rev 2018 08 24;8:CD012464. Epub 2018 Aug 24.
Effective Care Research Unit, Department of Obstetrics and Gynaecology, Faculty of Medicine, College of Health Sciences, Nnamdi Azikiwe University, Nnewi Campus, PMB 5001, Nnewi, Anambra State, Nigeria.