Liam Zakko1, Prasad Iyer1, Kavel Visrodia1, Kenneth K Wang2. 1. Barrett's Esophagus Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester 55905, MN, USA. 2. Barrett's Esophagus Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester 55905, MN, USA. Electronic address: wang.kenneth@mayo.edu.