I'd be inclined to indulge some of this if the only source was Ineos. After all I would trust Brailsford as far as I could throw him, probably less. He's one of those guys who, when his lips move, you can tell he is lying. (Actually, with Brailsford you can also tell from his hand movements)
But the fact that doctors have made statements about this makes me poo poo it all. Doctors - especially those not in the direct employ of Team Evil - are a touch more trustworthy.
(First person to say "Dr Freeman" gets a slap. Kick up the arse for the first to say "Dr Ferrari".)