@incollection{Ahmed20, author = {Monjur Ahmed}, title = {Peptic Ulcer Disease}, booktitle = {Digestive System}, publisher = {IntechOpen}, address = {Rijeka}, year = {2020}, editor = {Xingshun Qi and Sam Koruth}, chapter = {1}, doi = {10.5772/intechopen.86652}, url = {https://doi.org/10.5772/intechopen.86652} }