Guinan, M., M. McGuckin, and Y. Ali. 2002. The effect of a comprehensive handwashing education program on absenteeism in elementary schools. American Journal of Infection Control 31: 1-8.
White, C., R. Kolble, R. Carlson, N. Lipson, M. Dolan, Y. Ali, M. Cline. 2003. The effect of hand hygiene on illness rate among students in university residence halls. American Journal of Infection Control 13: 364-370.