Funding for this research was provided by:
National Institute on Drug Abuse (1F32DA033742-01A1, L40 DA042431)
National Institute of General Medical Sciences (1P20GM121341-01)
Direktoratet for internasjonalisering og kvalitetsutvikling i høgare utdanning (PNA-2014/10088, NNA-2016/10023)
Text and Data Mining valid from 2019-08-20
Received: 20 March 2019
Accepted: 6 August 2019
First Online: 20 August 2019
Ethics approval and consent to participate
: Not applicable.
: The authors declare that they have competing interests.