AUTHOR=Xu Liang , Zhou Ruiyi , Zhong Jiafeng , Huang Yina , Zhu Yingjie , Xu Wei TITLE=Social hierarchy modulates drug reinforcement and protein phosphorylation in the nucleus accumbens JOURNAL=Frontiers in Pharmacology VOLUME=Volume 16 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2025.1537131 DOI=10.3389/fphar.2025.1537131 ISSN=1663-9812