According to the world anti-doping code requirements samples can be analyzed only in WADA accredited laboratories. At the moment, there are 34 accredited laboratories in the world.
Laboratory has no information about the identity of the athlete when conducting the analysis. They are only sent data on the number of samples, which later allow to "bind" the results of the analysis to the profile of a particular athlete in ADAMS.
The work of the laboratories is governed by the International standard for laboratories.