Reza Shokrollahi Mohammad, Tabatabaei Azardokht, Farhadi Mohammad, Noorbakhsh Samileh, Movahedi Zahra, Role of Helicobacter Pylori in Nasal Polyp Formation: A Case-Control Study in Tehran, Iran, Journal of Otolaryngology Advances, Volume 1, Issue 2, 2016, Pages 21-27, ISSN 2379-8572, https://doi.org/10.14302/issn.2379-8572.joa-15-814. (https://openaccesspub.orgjoa/article/222) Keywords: Nasal polyp; H. pylori; Polymerase chain reaction; ELISA.