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Measurement of trueness in the two labs. Bias was calculated using inter-laboratory comparison (ILC) according to the following formula: Bias (%) = ((m − v)/v) × 100; m is the mean of values measured by the lab for the same batch of ILC and v is the target value provided by the quality control body
| ILC 1 | ILC 2 | ILC 3 | |
|---|---|---|---|
| Bias (%) lab 1 | −0.07 | −0.02 | −0.03 |
| Bias (%) lab 2 | −0.02 | −0.03 | 0.03 |
