Blood tests for HGH in the NFL

Players of the NFL distrust methods used by the WADA. Why did the distrust appear? Let try to understand the reason.
The World Anti-Doping Agency (WADA) wants to test players of the National Football League for HGH. Althogh the NFL Players’ Association has agreed, certain skeptic words connected with the level of trustworthiness of blood test for HGH were expressed. This test is going to be only a part of the testing for anabolic steroids and other performance-enhancing substances.
Some specialists that are not related to the WADA activity directly don’t agree with the methods used by this agency. They support the skepticism of the NFL players.
Matt Chaney, a main chronicler of intake of steroids in American football, is sure that players of the NFL distrust the WADA anti-doping tests not without any reason. Skeptic attitude of the players is justified by Matt Chaney.
Don Catlin, the director of Anti-Doping Research, confirms that methods of the WADA for detection of HGH must be transparent. The WADA uses the HGH isoform ratio test elaborated by Christian Strasburger.
It is necessary to mention that according to several specialists, the HGH isoform ratio test doesn’t have scientific basis. It is not trustworthy. Catlin confirms that this test is not useful for detection of HGH at all.
There is another test which can be applied by the WADA to catch sportspersons who apply HGH. Sonksen introduced a certain HGH testing method which is based on physiological biomarkers. But the WADA doesn’t use the method of Sonksen to identify users of HGH.
According to Sonksen, employees of the WADA are not specialists in this area. That’s why they don’t see the priority of one method over the other. But as it was proved by scientists, the HGH biomarker test is better than HGH isoform test.
Although scientists claim about difference between these two tests, the WADA doesn’t desire to to use the other method.