

@article {8300,
	title = {Seroprevalence of Helicobacter pylori infection in Polish children and adults depending on socioeconomic status and living conditions},
	journal = {Advances in Medical Sciences},
	volume = {59},
	year = {2014},
	pages = {147{\textendash}150},
	author = {{\L}aszewicz, Wiktor and Iwa{\'n}czak, Franciszek and Iwa{\'n}czak, Barbara}
}
