1Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA;

2Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA;

3Department of Surgical Pathology, Mayo Clinic, Rochester, Minnesota, USA;

4Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA.

Correspondence: Shounak Majumder, MD. E-mail: [email protected].