Funding for this research was provided by:
Delegación del Gobierno para el Plan Nacional sobre Drogas (2019I017)
Received: 29 March 2021
Accepted: 27 July 2021
First Online: 6 August 2021
: Informed consent was obtained from all subjects involved in the study. The study was approved by the Research Ethics Committee of the Instituto de Salud Carlos III (CEI PI 44_2018_subproyecto1-v2 and CEI PI 44_2018_subproyecto2).
: Not applicable.
: The authors declare that they have no competing interests.