Substance, use in relation to COVID-19: A scoping review.

"we published a study protocol ( ) and registered the study on the open science framework (osf/io/tzgm5) to enhance methodological transparency and improve reproducibility of results and evidence synthesis3 3 1 published research (peer reviewed and grey literature such as reports research letters and briefs where primary data was collected) investigating substance use and covid-19 in all populations settings and study designs e g studies with small samples quantitative and qualitative studies were included."

"Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. Navin Kumar received funding from the Foundation for a Smoke-Free World for a separate project."

"We thank the reviewers and editors for their assistance. Study was funded by the 10.13039/100006699Institution for Social and Policy Studies, Yale University and The 10.13039/100009239Horowitz Foundation for Social Policy. DH was funded by a NIDA grant (R01DA048860). The funding body had no role in the design, analysis, or interpretation of the data in the study. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. Navin Kumar received funding from the Foundation for a Smoke-Free World for a separate project."