Funding for this research was provided by:
National Institute of Mental Health (MH020065)
National Institute on Drug Abuse (DA02812)
National Institute of General Medical Sciences (GM007281)
Received: 13 December 2016
Accepted: 29 March 2017
First Online: 21 April 2017
Compliance with ethical standards
: This research was supported by DA02812. M.A.M was supported by a National Institute of Mental Health training grant (T32 MH020065) and A.K.B. was supported by a training grant from the National Institute of General Medical Sciences (T32 GM007281).
: The authors declare that they have no conflicts of interest.