Progression-free survival and quality of life in metastatic breast cancer: The patient perspective oleh Shirley Mertz, Christine Benjamin, Charis Girvalaki, Antonella Cardone, Paulina Gono, Suepattra G. May, Erin Comerford, Kyi-Sin Than, Kelly Birch, Meaghan Roach, Sky Myers, Medha Sasane, Liat Lavi, Anna Cameron, Fatima Cardoso