ERBB2 and familial pancreatic carcinoma: The mode of action of both gamma and delta‐tocotrienol on pancreatic cancer cell lines showed significant anti‐proliferative and apoptotic ability by suppressing; ERK/MAP kinase, phosphorylation of Akt, and ribosomal protein S6 kinase (RSK), through the downregulation of Her2/ErbB2 mechanism at the messenger level.170