Table A2.

NordiQC scoring criteria which include staining intensity, signal-to-noise ratio, background staining, aberrant staining pattern, counterstaining and preservation of morphology [57].

Score	Criteria
Optimal (3)	Staining reaction considered perfect or close to perfect.
Good (2)	Staining reaction considered fully acceptable. The protocol may be optimized to ensure the best staining intensity and signal-to-noise ratio.
Borderline (1)	Staining considered insufficient.
Poor (0)	Staining considered very insufficient.