- Correspondence to Dr Okeoma Mmeje, Department of Obstetrics and Gynecology, University of Michigan, L4100 Women's Hospital, 1500 East Medical Center Drive, Ann Arbor, MI 48109-5276, USA;
- Received 12 September 2016
- Revised 4 April 2017
- Accepted 21 April 2017
- Published online 17 May 2017.
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