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There is no other potential conflict of interest, real or perceived, in the conduct of this study. All study authors were involved in the collection of data, review of the manuscript, and the decision to submit this manuscript to the Journal of Perinatology. No honorarium, grant, or payment was provided to anyone to produce this manuscript.","order":1,"name":"Ethics","label":"Competing interests","group":{"name":"EthicsHeading","label":"Ethics"}},{"value":"This multicenter retrospective study was conducted in strict adherence to all applicable guidelines and regulations. Institutional Review Board (IRB) approval was secured from each participating site (Duke Health IRB: Pro00101971; University of California, Davis: IRB1367680-1; Wayne State University: IRB104218MP2E; Sharp Center for Research: IRB00000920). In view of the retrospective nature of the study and the use of de-identified data, the requirement for informed consent was formally waived by the respective IRBs.","order":2,"name":"Ethics","label":"Ethics approval and consent to participate","group":{"name":"EthicsHeading","label":"Ethics"}}]}}