Are blood tests for HGH effective?

NFL players don’t trust methods used by the WADA. Why did the distrust appear? Let try to find out the reason.
The World Anti-Doping Agency (WADA) intends to test players of the National Football League for HGH. However the NFL Players’ Association has agreed, certain skeptic thoughts linked with the grade 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 drugs.
Several experts that are not related to the WADA activity directly do not agree with the methods utilized by this agency. They support the skepticism of the NFL players.
Matt Chaney, a main chronicler of intake of steroids in American football, confirms that the NFL players are skeptic to 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, points out that methods of the WADA for detection of HGH should be transparent. The WADA utilizes the HGH isoform ratio test introduced by Christian Strasburger.
It is necessary to mention that according to some specialists, the HGH isoform ratio test doesn’t have scientific basis. It is not trustworthy. The Director of Anti-Doping Research claims that this test is not good for detection of HGH at all.
There is another test that can be utilized by the WADA to determine sportspersons that 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 determine users of HGH.
According to Sonksen, workers of the WADA are not specialists in this area. That’s why they do not understand the priority of one method over the other. But as it was proved by specialists, the HGH biomarker test is better than HGH isoform test.
Although scientists confirm about difference between these two tests, the WADA doesn’t want to to utilize the HGH biomarker test.