Characterising Insistence on Sameness and Circumscribed Interests: A Qualitative Study of Parent Perspectives. - Spackman E; Geng A; Smillie LD; Frazier TW; Hardan AY; Alvarez GA; Whitehouse A; Schuck RK; Leekam SR; Uljarević M (Journal of autism and developmental disorders, 2025)