Efficacy and safety of electroacupuncture on treating mild to moderate first-episode depression: a study protocol for a randomized controlled trial - Xia, Jingyu; Jiang, Minghui; Yin, Xuan; Wang, Zuqing; Li, Feng; Wei, Haiyan; Jin, Chuanyun; Hu, Yanmei; Chen, Jianhua; Xu, Shifen (Frontiers in Psychiatry, 2025)