Serum Endogenous Opioid Levels are Associated with Self-Injury Severity in Adolescents with Non-Suicidal Self-Injury and Comorbid Depression. - Ding JJ; Liu XL; Li A; Liang YY; Wang YB; Zhu XN; Li J; Weng J; Yan L; Duan WW; Zhang ZC; Yuan TF; et al. (Neuroscience bulletin, 2026)