title: Long-term vagus nerve stimulation for severe refractory depression: a case study with a six-year follow-up.
authors.forename: Weiqing
authors.initials: W
authors.lastname: Yuan
authors.forename: Barry N
authors.initials: BN
authors.lastname: Williams
mesh_terms: D000328:Adult; D061218:Depressive Disorder, Treatment-Resistant / Q000628:therapy*; D005260:Female; D006801:Humans; D016896:Treatment Outcome; D014630:Vagus Nerve / Q000502:physiology*; D055536:Vagus Nerve Stimulation / Q000379:methods*