I contacted Dr. Barken way back in 2002 as one of my web advisors and info guys. Not part of my 8 opinions I got, those were face to face with various doctors of many types. Anyway Dr. Barken has been consistent in his advice to PCa over all the years and his wisdom seems to match up with and is pretty consistent with peers like Dr. Strum, Scholz, Lam et al others. He has various ways to get in touch with him, retired, but works as the PC-Ref for coaching and some advising on P2P.
www.pcref.org I think is his website still.
His mantra behind the doctors oath, is refreshing in statements like less intervention and more on surveilence and assessments. I will quote some of the items at P2P for people herein so you get an idea of his philosophies in treating a patient. Now this was a reply to a specific patient whom is post primary treatments, so not to be taken out of context and not to be held at only face value, without a seeing the full context, so don't shoot down the underlying statements.