1. Department of Oncology, Sol Goldman Pancreatic Cancer Research Center; Johns Hopkins University; Baltimore MD USA
2. Department of Pathology, Sol Goldman Pancreatic Cancer Research Center; Johns Hopkins University; Baltimore MD USA
3. Department of Pathology; University Medical Centre Utrecht; The Netherlands
4. Department of Pathology; Memorial Sloan-Kettering Cancer Center; New York USA
5. Department of Surgery; Sol Goldman Pancreatic Cancer Research Center, Johns Hopkins University; Baltimore MD USA