Helicobacter pylori infection a risk for upper gastrointestinal diseases among patients in North Central Nigeria by Kefas P Zawaya, Jacob A Dunga, Yakubu Adamu, Sule J Bathnna, Haruna U Liman, Jafiada J Musa, Sulaiman Y Yusuf, Innocent Vakkai, Ruth Adabe, E N Okeke, E I Agaba

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