I.4.3 The integrity of the Markers used in the hematological module of the Athlete Biological Passport is guaranteed when the Blood Stability Score (BSS) remains below eighty -five (85), where the BSS is computed  as:  BSS = 3 * T + CAT  with CAT being the Collection to Analysis Time (in hours), and T the average Temperature  (in degrees Celsius) measured by the data logger between Sample collection and analysis.