Assessing parents' knowledge and attitudes towards seasonal influenza vaccination of children before and after a seasonal influenza vaccination effectiveness study in low-income urban and rural Kenya, 2010-2011. - Adhiambo Oria, Prisca; Arunga, Geoffrey; Lebo, Emmaculate; Wong, Joshua M.; Emukule, Gideon; Muthoka, Philip; Otieno, Nancy; Mutonga, David; Breiman, Robert F.; Katz, Mark A. (BMC Public Health, 2013)