Question: is this a 2) strong advice, 1) weak advice 0) no advice?

We investigated the performance of the CDI in-line blood gas monitor with and without the recommended gas calibration prior to use, with regard to the three parameters pH, pCO2, and pO2, compared to our standard, the ABL 800 flex, and found that without gas calibration and before in-vivo calibration, the CDI estimates were inaccurate and imprecise for pH and pCO2 when compared to the calibrated measurement series. 
user
This is no advice
assistant