Multilevel Analysis on the Contextual Effects of Hygiene, Environmental Sanitation, and Diarrhea Prevention in Elementary School Students in Ngawi, East Java. J Epidemiol Public Healt [Internet]. 2017 May 1 [cited 2026 Feb. 11];4(2):97-108. Available from: https://www.jepublichealth.com/index.php/jepublichealth/article/view/130