Use of Electroconvulsive Therapy for Catatonia in Down Syndrome Regression Disorder: A Systematic Review, Case Series, and Analysis - Seri Lim; Kaidi Kang; Elizabeth Oey; Stephanie Santoro; Catherine Franklin; James Luccarelli; Rafael Tamargo; Courtney Hamilton; Sarah Marler; Timothy Adegoke; Jo Ellen Wilson; Joshua Ryan Smith (Journal of Autism and Developmental Disorders, 2026)