title: Valid consent and refusal.
mesh_terms: D000328:Adult; D000368:Aged; D004992:Ethics, Medical; D005260:Female; D006801:Humans; D007258:Informed Consent / Q000331:legislation & jurisprudence*; D008297:Male; D008875:Middle Aged; D010353:Patient Education as Topic / Q000331:legislation & jurisprudence*; D010686:Philosophy, Medical; D011613:Psychotherapy; D012017:Referral and Consultation / Q000331:legislation & jurisprudence; D016312:Treatment Refusal