Authors:Lyudmila Boyanova, Petyo Hadzhiyski, Rumyana Markovska, Penka Yaneva, Daniel Yordanov, Galina Gergova and Ivan Mitov
Helicobacter pylori infection is a common chronic infection affecting about half of human population worldwide and is most often acquired in early childhood [ 1 , 2 ]. Among children, prevalence of the
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