Ten-year relative survival curves by age group, sex, and Binet stage at diagnosis according to the calendar period (1980-1994 or 1995-2004) in which the patients with CLL were diagnosed. (A) Age older than 70 years; (B) age younger than 70 years; (C) females; (D) males; (E) Binet stage A; (F) Binet stage B/C.