Long-term survival of a patient with advanced pancreatic cancer under adjunct treatment with Viscum album extracts: A case report World J GastroenterolWerthmann, Paul G.; Kempenich, Robert; Lang-Avérous, Gerlinde; Kienle, Gunver S.March 14, 2021Radiofrequency ablation, Viscum album extract, long-term survival, Integrative medicine, Pancreatic cancer