**Percentage of POS as a function of time**

Illustration of the algorithm from Barak et al.{1} considered POS when the concentration first exceeds the cut-off (TPA = 95U/L). Percentage POS as a function of time for four different exponential increases with = 0.0132 (-○-), = 0.0346 (-+-), and = 0.0907 (-x-) according to 0.95\* e\*t U/L. The steady-state simulation is represented by λ = 0.0000 (-●-).

Fig. 3. Percentage positive patients (POS) as a function of time.
