1. Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
2. Stephenson Oklahoma Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
3. Department of Veterans Affairs Medical Center, Oklahoma City, OK, USA
4. Klinikum rechts der Isar, II. Medizinische Klinik, Technische Universität München, Munich, Germany
5. Department of Digestive and Liver Diseases, Columbia University Medical Center, New York, NY, USA
6. COARE Biotechnology, Oklahoma City, OK, USA