Effects of indoor biophilic environments on cognitive function in elderly patients with diabetes: study protocol for a randomized controlled trial - Dai, Jiajia; Wang, Mohan; Zhang, Han; Wang, Zhengfang; Meng, Xue; Sun, Yanan; Sun, Yuan; Dong, Wenhui; Sun, Zhiying; Liu, Kuo (Frontiers in Psychology, 2025)