Altered functional activity and connectivity in Parkinson’s disease with chronic pain: a resting-state fMRI study - Wang, Erlei; Zou, Nan; Zhang, Jinru; Bao, Yiqing; Ya, Yang; Shen, Junkang; Jia, Yujing; Mao, Chengjie; Fan, Guohua (Frontiers in Aging Neuroscience, 2025)