Phil
You are flogging a dead horse. The UCI and the WADA are happy that Froome has done nothing wrong. As a point of interest, quite a lot of Grand Tour riders (especially) suffer chest problems - after slogging one's way up a mountain with the sweat pouring off you, then being frozen on the descent, sometimes reaching speeds of 70 mph, it's not very surprising. Years ago you would see riders at the summit of a col getting newspapers from spectators and stuffing them inside their jerseys for protection against the cold on the descent - doesn't seem to happen now, don't know why. Perhaps modern clothing offers better protection from the cold.
Mike