Funding for this research was provided by:
Eunice Kennedy Shriver National Institute of Child Health and Human Development (R00HD079561)
Text and Data Mining valid from 2017-12-01
Received: 19 December 2017
Accepted: 2 February 2018
First Online: 20 February 2018
Compliance with Ethical Standards
: This present study was approved and carried out in accordance with the guidelines from the Institutional Review Board at Oregon State University. All mothers gave their informed consent.
: The authors declare that they have no conflict of interest.