Chronic pain, cannabis legalisation, and cannabis use disorder among patients in the US Veterans Health Administration system, 2005 to 2019: a repeated, cross-sectional study

Deborah S. Hasin, Melanie M. Wall, Daniel M. Alschuler, Zachary L. Mannes, Carol A. Malte, Mark Olfson, Katherine M. Keyes, Jaimie L. Gradus, Magdalena Cerdá, Charles Maynard, Salomeh Keyhani, Sílvia S. Martins, David S. Fink, Ofir Livne, Yoanna E. McDowell, Scott E. Sherman, Andrew J. Saxon