Heterotopic Gastric Mucosa Presenting as Lower Gastrointestinal Bleeding: An Unusual Case Report oleh Syed Muhammad Ali, Ayman Abdelhafiz Ahmed, Leena Amin Hussain Saaid, Gihan Mustafa Kamal Mohamed, Amjad Ali Shah, Mohannad Al-Tarakji, Zia Aftab, Inamulla, Sameera Rashid