Funding for this research was provided by:
National Center for Complementary and Integrative Health (R21AT008865)
National Institute of Mental Health (R01MH112748, R01MH111917, K24MH116366)
National Institute on Drug Abuse (R21DA042271)
National Institute of Aging & National Institute of Mental Health (R01AG042512)
First Online: 8 January 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: For this type of study formal consent is not required.
: Informed consent was obtained from all individual participants included in the study.