AUTHOR=Zhang Zheng , Zhang Zhenyu , Zhang Guoquan TITLE=Systemic doxycycline as an adjunct to nonsurgical periodontal therapy in diabetic patients with periodontitis: a systematic review and meta-analysis JOURNAL=Frontiers in Physiology VOLUME=15 YEAR=2025 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2024.1479152 DOI=10.3389/fphys.2024.1479152 ISSN=1664-042X