Altered gray matter network segregation and disrupted interregional connectivity in children with persistent developmental stuttering: a graph-theoretical morphometric study - Wanqing Liu; Dan Ma; Chuanlong Cao; Sai Liu; XinMao Ma; Fenglin Jia; Pei Li; Hui Zhang; Yimin Hua; Yi Liao; Haibo Qu (Brain Imaging and Behavior, 2026)