I would guess some of this was in play...BUT...Armstrong is still kicking and I would guess still able to ride a bike.
MANY of Lou's subjects are no where to be found and if they are still alive my guess is have absolutely no shot of racing let alone walking.
of the items listed only the corticosteroids are for pain. the horse business has been using theses for years i.e. cortisone. all the rest were performance enhancers. Lou's most remarkable turn arounds like real joke were lame horses with back class and ability. I'm sure something for pain with no testable markers was involved. that is just my own personal speculation, but the part of the article on epo about intravenous opposed to subcutaneously injections. low dosage administered at night so it would be out of the system in the mornings. diluting the blood with saline to lower the hemocrit was where i was going with this.