KRAS and pancreatic neoplasm: We are indebted to Prof. Matthias Löhr for KRAS determination, to Drs. Marco del Chiaro and Elena Rangelova for tissue procurement, Dr. Ernest Dodoo, Karolinska Hospital, Prof Elke Jäger, KHNW, Frankfurt, Germany for discussions; we are indebted to Dr. Carlos Fernando-Moro, Dept of Pathology, Karolinska Hospital for performing immunohistological analysis of tissue from patients with pancreatic cancer.