Koltun Walter A
a Division of Colon and Rectal Surgery, Penn State Hershey IBD Center, Penn State Hershey Medical Center , Penn State College of Medicine , Hershey , PA , USA.
Expert Rev Gastroenterol Hepatol. 2017 Jun;11(6):491-493. doi: 10.1080/17474124.2017.1309289. Epub 2017 Mar 28.