Erratum to: A phase 1b study of Selumetinib in combination with Cisplatin and Gemcitabine in advanced or metastatic biliary tract cancer: the ABC-04 study. Issue 1 (December 2016) - Bridgewater, John; Lopes, Andre; Beare, Sandra; Duggan, Marian; Lee, Dymphna; Ricamara, Maravic; McEntee, Delyth; Sukumaran, Ajithkumar; Wasan, Harpreet; Valle, Juan