ABCB1 and pancreatic neoplasm: Cells with the wild‐type SNPs of ABCB1 showed drug resistance in a pancreatic cancer cell line (Kasuya et al., 2012), and polymorphic variants of ABCB1 were observed to predict improved therapeutic efficacy and survival for patients with potentially resectable pancreatic cancer (Tanaka, Okazaki, Suzuki, Abbruzzese, & Li, 2011).