If you mean in thie NWBO case, no they did not. And I am not aware of any such admission elsewhere.
But by all means keep in the NWBO tradition of asserting facts based on other NWBO longs stating them based on other NWBO longs stating them ....
Kind of like the Hitonol approval Everybody knows how to find approved drugs easily, yet many here keep accepting it is approved because DD cites Peter who is qouted be AE citing Chiuguy ...