Effectiveness of pay it forward intervention compared to free and user-paid vaccinations on seasonal influenza vaccination among older adults across seven cities in China: study protocol of a three-arm cluster randomized controlled trial
在中国七个城市的老年人群中，与免费和付费疫苗接种相比，“传递爱心”干预措施对季节性流感疫苗接种效果的比较：一项三组整群随机对照试验的研究方案
期刊:BMC Public Health
影响因子:3.6
doi:10.1186/s12889-025-23301-2
Li, Qing-Qing; Huang, Zizhen; Chen, Jiangyun; Wang, Junjie; Li, Duqiao; Chen, Xiaoshan; Zhao, Qing; Liu, Siyuan; He, Wenjun; Luo, Huanyuan; Wan, Yuting; Tong, Guangyu; Zhang, Dexing; Cai, Yiyuan; Liang, Huijuan; Wu, Dan; Bishai, David; Xu, Dong Roman
