AUTHOR=Wu Dan , Xu Jiani , Zhang Haibo , Zhang Kai , Zhu Yongqian TITLE=Multimorbidity characteristics in older adults and their associated factors in complex networks: a cross-sectional study JOURNAL=Frontiers in Public Health VOLUME=13 YEAR=2025 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2025.1473572 DOI=10.3389/fpubh.2025.1473572 ISSN=2296-2565