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Cumulative percentage of deaths by treatment arm (Kaplan-Meier estimate). All patients randomly allocated to arms 1 and 2, including those randomised from arm 3. Numbers of patients surviving from years 1 to 9 were 294, 290, 282, 270, 254, 200, 146, 98, and 73 (arm 1); 317, 310, 291, 274, 258, 210, 140, 98, and 66 (arm 2)
