Verapamil enhances the antiproliferative effect of chemotherapeutic reagents and inhibits tumor growth of chemoresistant side population in pancreatic cancer - Zhao, L; Zhao, Y; Schwarz, B; Mysliwietz, J; Camaj, P; Bao, Q; Jauch, JW; Nelson, PJ; Guba, M; Ellwart, JW; Bruns, CJ; Bruns, AG (Zeitschrift für Gastroenterologie, 2012)