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Garcia-Romeu, Albert, David J. Cox, Kirsten E. Smith, Kelly E. Dunn, and Roland R. Griffiths. "Kratom (Mitragyna Speciosa): User Demographics, Use Patterns, and Implications for the Opioid Epidemic." Drug Alcohol Depend 2020.

Garcia-Romeu, Albert, et al. "Kratom (Mitragyna Speciosa): User Demographics, Use Patterns, and Implications for the Opioid Epidemic." Drug Alcohol Depend 2020.