PROJECTED ACCRUAL: A total of 903 patients (group 1) will be accrued for this study within 7.7 years. A total of 723 patients (group 2) will be accrued for this study within 3.8 years. (Group 2 [unfavorable prognosis] closed to accrual as of 9/2002.) (Group 1 [favorable prognosis] closed to accrual as of 4/28/04.)