Association between control group therapy and magnitude of clinical benefit of cancer drugs - Molto, Consolacion (Princess Margaret Cancer Centre and University of Toronto. Division of Medical Oncology and Hematology, Department of Medicine) ; Tibau Martorell, Ariadna (Institut d'Investigació Biomèdica Sant Pau) ; Bujosa, Aida (Hospital Universitari Son Llàtzer (Palma de Mallorca, Balears)) ; Tapia, Jose Carlos (Institut d'Investigació Biomèdica Sant Pau) ; Mittal, Abhenil (Princess Margaret Cancer Centre and University of Toronto. Division of Medical Oncology and Hematology, Department of Medicine) ; Tamimi, Faris (Princess Margaret Cancer Centre and University of Toronto. Division of Medical Oncology and Hematology, Department of Medicine) ; Amir, Eitan (Princess Margaret Cancer Centre and University of Toronto. Division of Medical Oncology and Hematology, Department of Medicine) ; Universitat Autònoma de Barcelona