Affiliation: | 1.College of Geography and Environmental Science, Henan University, Kaifeng, 475004, Henan, China ;2.Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Henan University, Kaifeng, 475004, Henan, China ;3.Department of Community Health Science, Cumming School of Medicine, University of Calgary, Calgary, Canada ;4.The Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524001, China ; |