RT Journal Article SR Electronic T1 Pancreatic Pathology by Günter Kloppel and Philipp U. Heitz JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 280 OP 281 VO 52 IS 2 A1 Petras, Robert E. YR 1985 UL http://www.ccjm.org/content/52/2/280.2.abstract AB