AUTHOR=Cao Hongliang , Wang Min , Duan Mengna , Wang Song , Zhang Haiyang 

TITLE=Association of serum calcium level with periodontitis: a cross-sectional study from NHANES 2009–2014

JOURNAL=Frontiers in Nutrition

VOLUME=11

YEAR=2025

URL=https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2024.1520639

DOI=10.3389/fnut.2024.1520639

ISSN=2296-861X