After the discovery of the 1 pmol/L = 3.671 pg/mL bug, we should recheck the data.

I used the y0_m16 inital data from the former python code for the reference solution. y0 is more common though.

• Find reference y0 / parameters.
• When replacing this check the order of the arguments and possible different units.
• Also check the units in the Pfizer data.