I get that Bailey is saying that he and Bolt are the only 100m champions to have never returned an adverse analytical finding, but he was treated by Tony Galea (see link below). I have two friends that were treated by Galea; one says they refused a second appointment after Galea suggested in the first that they play with their hormone levels a bit to maximize performance while staying within legal limits, and the other says that they went on a Galea-monitored HGH regimen.
Call it what you will.
https://www.cbc.ca/sports/canadian-md-a-suspect-in-sports-doping-probe-1.852400