The proportion of days with febrile illness between @ and @ mo was @ % , and there were no differences between the groups : @ % ( @ % CI : @ , @ % ) , @ % ( @ % CI : @ , @ % ) , @ % ( @ % CI : @ , @ % ) , and @ % ( @ % CI : @-@ @ % ) in the milk-LNS , soy-LNS , CSB , and control groups , respectively .