Construction and Application of a Three-Level Linkage System for the Prevention and Treatment of Pressure Sores in Geriatric Patients in the Henan Province, China - Hu, Danhua; Ning, Jing; Sun, Yanjie; Wang, Shanshan; Jin, Nannan; Chen, Yali; Zhang, Na; Zuo, Xiaoliang; Zhao, Lijuan; Tian, Yazhen; Wang, Xiaomeng; Xing, Zhijie; et al. (Iranian Journal of Public Health, 2022)