Medical Scientist Training Program, Mayo Clinic, Rochester, MN 55905, USA. Department of Anesthesiology, CH du Forez, 42600 Montbrison, France. Mayo Graduate School, Mayo Clinic, Rochester, MN 55905, USA. Department of Psychiatry & Psychology, Mayo Clinic, Rochester, MN 55905, USA. Department of Anesthesiology, Mayo Clinic, Rochester, MN 55905, USA.