1. Anesthesiology Department, Chronic Pain and Fatigue Research Center, University of Michigan Medical School, Ann Arbor, Michigan (K.F.B., F.G., T.S.)
2. Cannabis Strategy Unit, Division of Overdose Prevention, National Center for Injury Prevention and Control, Centers for Disease Control and Prevention, Atlanta, Georgia, and Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee (R.S.)
3. Veterans Affairs Ann Arbor Healthcare System and Department of Psychiatry, University of Michigan Medical School, Ann Arbor, Michigan (A.H.)
4. Cannabis Strategy Unit, Division of Overdose Prevention, National Center for Injury Prevention and Control, Centers for Disease Control and Prevention, Atlanta, Georgia (D.R.R., B.H.).