Kennedy MC, Tobias S, Dong H, Buxton JA, Lysyshyn M, Tupper KW, Ti L Author reply to letter to the editor in response to "Fentanyl concentration in drug checking samples and risk of overdose death in Vancouver, Canada" Am J Prev Med PubMed

Kennedy MC, Dong H, Tobias S, Buxton J, Lysyshyn M, Tupper K, Ti L Fentanyl concentration in drug checking samples and risk of overdose death in Vancouver, Canada Am J Prev Med PubMed

Tobias S, Grant CJ, Laing R, Lysyshyn M, Buxton JA, Tupper KW, Wood E, Ti L What impact did the COVID-19 pandemic have on the variability of fentanyl concentrations in the Vancouver, Canada illicit drug supply? An interrupted time-series analysis BMJ Public Health Link

Tobias S, Lysyshyn M, Buxton J, Tupper KW, Ti L Tobias et al. respond to "Novel surveillance of the unregulated drug supply" Am J Epidemiol PubMed

Tobias S, Grant C, Laing R, Arredondo J, Lysyshyn M, Buxton J, Tupper K, Wood E, Ti L Time-series analysis of fentanyl concentration in the unregulated opioid drug supply in a Canadian setting Am J Epidemiol PubMed

Ti L, Tobias S, Lysyshyn M, Laing R, Nosova E, Choi J, Arredondo J, McCrae K, Tupper K, Wood E Detecting fentanyl using point-of-care drug checking technologies: a validation study Drug Alcohol Depend PubMed

McCrae K, Tobias S, Tupper K, Arredondo J, Henry B, Mema S, Wood E, Ti L Drug checking services at music festivals and events in a Canadian setting Drug Alcohol Depend PubMed

Lake S, Gaddis A, Tupper KW, Nosova E, DeBeck K 3,4-Methylenedioxymethamphetamine (MDMA; ecstasy) use and transitions to injection drug use among street-involved youth Subst Abus PubMed

Bardwell G, Boyd J, Tupper K, Kerr T "We don't got that kind of time, man. We're trying to get high!": Exploring potential use of drug checking technologies among structurally vulnerable people who use drugs Int J Drug Policy PubMed

Argento E, Tupper KW, Socías ME The tripping point: the potential role of psychedelic-assisted therapy in the response to the opioid crisis Int J Drug Policy PubMed