Thank you for your reply. My Urologist is considering this, not me. I had lost some confidence in him and made an appointment with our local Comprehensive Cancer Center for a second opinion a couple of weeks ago. Stampede study and NCCN protocol point to minimum 18 months so his 6 months fell short and confirmed my decision to seek another doctor. I have found this group's experience very helpful and full of rich resources. No one here told me what to do but pointed towards the places where the current research is and shared from their personal experiences which I respect. Eternally grateful.