Correction: Overall survival of patients with KIT-mutant metastatic GIST in the era of multiple kinase inhibitor availability - Valerie Haller; Carina Reiff; Rainer Hamacher; Karina Kostbade; Moritz Kaths; Juergen Treckmann; Stefanie Bertram; Yasmin Zaun; Sebastian Bauer; Johanna Falkenhorst (Journal of Cancer Research and Clinical Oncology)