Journal Article
                        
                        Cha, Seungman, Douk  Kang, Benedict  Tuffuor, Gyuhong  Lee, Jungmyung  Cho, Jihye  Chung, Myongjin  Kim, Hoonsang  Lee, Jaeeun  Lee, and Chunghyeon  Oh.  
"The effect of improved water supply on diarrhea prevalence of children under five in the Volta region of Ghana: a cluster-randomized controlled trial." International Journal of Environmental Research and Public Health 12, no. 10 (2015): 12127-12143.