Walsh, Z., Mollaahmetoglu, O., Rootman, J., Golsof, S., Keeler, J., Marsh, B., … Morgan, C. (2021). Ketamine for the treatment of mental health and substance use disorders: comprehensive systematic review. BJPsych Open, 8(1), e19. https://doi.org/10.1192/bjo.2021.1061 (Original work published 2021)