Blood (6) temps (durée) (5) Time (5) Manufacturers' agents (4) Commission merchants (4) Athletes (4) Sports (4) monde (3) étable (3) investigation (3) comparaison (3) altitude (3) Comparison (3) Variation (3) Sports (3) Performance (3) Human beings (3) Days (3) Day (3) Detection (3) Performance (3) administration (2) formation (2) test (2) stéroïde (2) sport (2) niveau de la mer (2) recherche (2) oxygène (2) surveillance (2)