AUTHOR=Liu Chen , Kong Yue , Su Qun , Xing Huaizhen , Tian Zhongbao TITLE=The impact of the urban–rural residents’ medical insurance integration on rural residents’ out-of-pocket medical costs: based on the deductible, reimbursement rate, and ceiling line JOURNAL=Frontiers in Public Health VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2025.1576978 DOI=10.3389/fpubh.2025.1576978 ISSN=2296-2565