AUTHOR=Dai Jiajia , Wang Mohan , Zhang Han , Wang Zhengfang , Meng Xue , Sun Yanan , Sun Yuan , Dong Wenhui , Sun Zhiying , Liu Kuo TITLE=Effects of indoor biophilic environments on cognitive function in elderly patients with diabetes: study protocol for a randomized controlled trial JOURNAL=Frontiers in Psychology VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2025.1512175 DOI=10.3389/fpsyg.2025.1512175 ISSN=1664-1078