Additional file 2: of Role of ecological approaches to eliminating schistosomiasis in Eryuan County evaluated by system modelling DongYi DuChun-Hong ZhangYun WangLi-Fang SongJing WuMing-Shou YangWen-Can LvShan ZhouXiao-Nong 2018 Diagram of main causal chains. (DOCX 43 kb)