Knowledge regarding helicobacter pylori infection among patients in hail region of Saudi Arabia by Ahmed Nawi Alshammari, Mubashir Zafar, Mohammed Salem Alharbi, Sumayyah Mohammad Almarshedy, Fayez Saud Alreshidi, Hend Faleh Hamad Alreshidi, Ibrahim Abdullah Alnais, Abdulilah Saad Aldhmadi, Abdulaziz Fahad Alhumaid, Rahaf Mulayh Alshammari, Razan Fehaid Alshammari, Ranim Fahad Alhejaily, Syed Shah Mohammed Faiyaz, Mohd Saleem, Malik Asif Hussain

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