Comparison of invasive histological and molecular methods in the diagnosis of Helicobacter pylori from gastric biopsies of Sudanese patients: a cross-sectional study [version 2; pe... oleh Wafa Elshareef, Yousif Hamedelnil, Esraa Osman, Aliaa Abugrain, Hisham Altayb, Maram Elnosh, Ahmed Ismail, Abdelhamid Abdelhamid, Aalaa Albasha, Ahmed AbdAlla, Ehssan Moglad