Good questions. By off the record I mean in interviews rather than as articles in medical journals. As to who they are, I'm afraid you'll have to research for yourself as I never keep records of my own research as it's for my entertainment.
Of course it's hearsay but since this is not a court of law (and sometimes hearsay is admissible in court under certain circumstances), it's irrelevant, as this is not a forum for scientific proofs but rather a chat amongst friends. You may wish to take yourself a little less seriously, it will expand your mind.