**Author details**

Vincenzo Neri1 \* and Monjur Ahmed<sup>2</sup>

1 Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy

2 Department of Medicine, Thomas Jefferson University, Philadelphia, PA, USA

\*Address all correspondence to: vincenzo.neri@unifg.it

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

*Introductory Chapter: Complications of Gastroduodenal Ulcers DOI: http://dx.doi.org/10.5772/intechopen.101478*
