James-Todd, Tamarra M
Meeker, John D
Huang, Tianyi
Hauser, Russ
Seely, Ellen W
Ferguson, Kelly K
Rich-Edwards, Janet W
McElrath, Thomas F
Article History
Received: 9 April 2015
Accepted: 25 November 2015
First Online: 10 February 2016
Competing interests
: The authors declare no conflict of interest.