TY JOUR TI Cotard's syndrome in adolescence KW Cotard's syndrome KW adolescence KW psychosis KW schizoaffective disorder KW psychopharmacotherapy KW ECT JO Modern Therapy in Psychiatry and Neurology Journal AU Oleychik, I.V. AU Shishkina, A.V. AU Baranov, P.A. AU Sizov, S.V. PY 2026 IS 2026 PB Publishing house "Logos Press"