NSSI contagion in adolescent friendships: exploring the impact of peer influence. - Ke, Chunxi; Zhou, Zhiruo; Ren, Zhixuan; Li, Xiaoshu; He, Hairuo; Chen, Yafei; Liu, Mengjun; Yao, Yunheng; Ju, Yumeng; Zhang, Yan (Child & Adolescent Psychiatry & Mental Health, 2025)