Funding for this research was provided by:
National Institute of Mental Health (5T32MH093315-03)
National Science Foundation (DMS-1345499)
Foundation of Hope
North Carolina Translational and Clinical Sciences Institute
Mathematical Association of America
Received: 17 July 2017
Accepted: 23 January 2018
First Online: 1 February 2018
Ethics approval and consent to participate
: The study was approved by University of North Carolina at Chapel Hill (Study #17342) Institutional Review Board. All women gave written consent to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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