The passport, which tracks an athlete's blood profile over time, doesn't necessarily detect doping, but rather the physiological changes it causes.

Although IP is well-described as a systemic illness with a long prodrome, there has been no comprehensive overview of the blood profile.

Oxidative stress was determined through blood profile tests performed 24 hours before and after high-altitude exposure, assessing the oxidative damage and antioxidant profiles.

Biological passports track changes in athletes' blood profiles which could be caused by doping.

The IAAF has already publicly published (in 2011) a review of its blood profiles in a peer reviewed journal.