“…(a) Disease and clinical factors: Key factors in decisions to stop treatment included worsening patient condition or functional status [ 10 , 38 , 43 , 44 , 49 , 52 , 55 , 57 – 60 ] disease progression or advanced stage disease [ 9 , 38 , 40 , 43 , 44 , 47 , 49 , 52 , 57 , 60 ] and treatment side effects [ 7 , 38 , 49 , 52 , 55 , 59 – 61 ]. Patients who received their diagnosis when only in advanced disease, and patients who had not received treatment earlier in the course of illness for other reasons, often had their therapy extended much longer than patients who had received earlier treatments [ 5 , 38 , 62 – 65 ].…”