8. Disease free of prior malignancies for ≥ 5 years with exception of currently treated basal cell, squamous cell carcinoma of the skin, or carcinoma "insitu" of the cervix or breast. Patients with low- and intermediate-risk prostate cancer who have had either local therapy (radiation or surgery) or are actively receiving hormonal therapy will also be allowed. Patients being observed with "watchful waiting" will be excluded. Low- and intermediate-risk prostate cancer will be defined as PSA ≤ 20, Gleason score ≤ 7, and AJCC clinical stage of ≤ T2b.