JAG1 and ovarian carcinoma: We thank Prof. B. K. Tsang (Department of Obstetrics and Gynecology, University of Ottawa) for providing cisplatin-sensitive (A2780s and OV2008) and cisplatin-resistant (A2780cp and C13*) ovarian cancer cell lines, Prof. Aly Karsan (British Columbia Cancer Research Centre, Canada) for providing the JAG1 expressing plasmid (pCD-HA/JAG1), and Prof. Ryoichiro Kageyama (Kyoto University, Japan) for providing pHES1-luc plasmid.