Petrick, J L
Steck, S E
Bradshaw, P T
Trivers, K F
Abrahamson, P E
Engel, L S
He, K
Chow, W-H
Mayne, S T
Risch, H A
Vaughan, T L
Gammon, M D
Article History
Received: 7 August 2014
Revised: 16 December 2014
Accepted: 8 January 2015
First Online: 10 February 2015
Competing interests
: PEA participated in this research during predoctoral work at UNC-Chapel Hill and currently consults for various pharmaceutical companies. No money was received from any pharmaceutical company. The remaining authors declare no conflict of interest.