Crepeault H, Socías ME, Tobias S, Lysyshyn M, Custance A, Shapiro A, Ti L Examining fentanyl and its analogues in the unregulated drug supply of British Columbia, Canada using drug checking technologies Drug Alcohol Rev PubMed

Beaulac M, Richardson L, Tobias S, Lysyshyn M, Grant C, Ti L Changes in the unregulated opioid drug supply during income assistance payment weeks in Vancouver, Canada: an exploratory analysis Int J Drug Policy PubMed

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

Laing MK, Ti L, Marmel A, Tobias S, Shapiro AM, Laing R, Lysyshyn M, Socías ME An outbreak of novel psychoactive substance benzodiazepines in the unregulated drug supply: preliminary results from a community drug checking program using point-of-care and confirmatory methods Int J Drug Policy PubMed

Beaulieu T, Wood E, Tobias S, Lysyshyn M, Patel P, Matthews J, Ti L Is expected substance type associated with timing of drug checking service utilization?: a cross-sectional study Harm Reduct J PubMed

Patel P, Guzman S, Lysyshyn M, Buxton J, Kuo M, Tobias S, Matthews J, Arredondo J, Ti L Identifying cocaine adulteration in the unregulated drug supply in British Columbia, Canada Can J Addict Link

Ti L, Tobias S, Maghsoudi N, Milloy MJ, McDonald K, Shapiro A, Beriault D, Stefan C, Lysyshyn M, Werb D Detection of synthetic cannabinoid adulteration in the unregulated drug supply in three Canadian settings Drug Alcohol Rev PubMed

McCrae K, Wood E, Lysyshyn M, Tobias S, Wilson D, Arredondo J, Ti L The utility of visual appearance in predicting the composition of street opioids Subst Abus PubMed

Tobias S, Shapiro A, Grant C, Patel P, Lysyshyn M, Ti L Drug checking identifies counterfeit alprazolam tablets Drug Alcohol Depend PubMed