AUTHOR=Yao Qihuan , Chen Guozhong TITLE=Association of biochemical indicators with multimorbidity in 19,624 older adult individuals with chronic diseases: a study from Jindong District, Jinhua City, China JOURNAL=Frontiers in Public Health VOLUME=13 YEAR=2025 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2025.1472415 DOI=10.3389/fpubh.2025.1472415 ISSN=2296-2565