<qa>  What is the risk group of CS T1a-T2a?- Patients belonging in one of the following risk groups: 1 LOW RISK: CS T1a-T2a, Gleason 2-6, PSA10, Nx-0, Mx-0; 2 INTERMEDIATE RISK: CS T2b, Gleason 7, PSA20, Nx-0, Mx-0, or CS T1a-T2b, Gleason 2-6, PSA10 20, Nx-0, Mx-0, or CS T1a-T2b, Gleason 7, PSA20, Nx-0, Mx-0; or 3 HIGH RISK: CS T2c-T3, any Gleason, any PSA, or CS T1-3, Gleason 8 andor PSA20 