1. The Sol Goldman Pancreatic Cancer Research Center, the Johns Hopkins University School of Medicine, Baltimore, MD, USA
2. Department of Pathology, the Johns Hopkins University School of Medicine, Baltimore, MD, USA
3. Department of Oncology, the Johns Hopkins University School of Medicine, Baltimore, MD, USA
4. Department of Radiology, the Johns Hopkins University School of Medicine, Baltimore, MD, USA
5. Department of Medicine, Division of Gastroenterology and Hepatology, the Johns Hopkins University School of Medicine, Baltimore, MD, USA