9BOWEN A, MA H, OU J, et al. A cluster-randomized controlled trial evaluating the effect of a handwashing-promotion program in Chinese primary schools. Am J Trop Med Hyq, 2007,76(6) :1 166 - 1 173.
10MIGELE J, OMBEKI S, AYALO M, et al. Diarrhea prevention in a Kenyan school through the use of a simple safe water and hygiene intervention. Am J Trop Med Hyg, 2007,76 (2) :351 - 353.