@article {k95,
	title = {A modified Shigella volunteer challenge model in which the inoculum is administered with bicarbonate buffer: clinical experience and implications for Shigella infectivity},
	journal = {Vaccine},
	volume = {13},
	number = {16},
	year = {1995},
	pages = {1488-1494},
	author = {Kotloff, Karen L}
}
