@article {grotto2001decline,
	title = {Decline in immunity to polio among young adults},
	journal = {Vaccine},
	volume = {19},
	number = {30},
	year = {2001},
	pages = {4162{\textendash}4166},
	publisher = {Elsevier},
	author = {Grotto, Itamar and Handsher, Rachel and Gdalevich, Michael and Mimouni, Daniel and Huerta, Michael and Green, Manfred S and Mendelson, Ella and Shpilberg, Ofer}
}
