Table 2. Summary of the assay parameters from the NPP assay.

	Incubation time
	10 min	20 min	40 min	60 min
Z’-value	0.65±0.19	0.80±0.12	0.81±0.02	−0.20±1.24
S/B ratio	2.7±0.19	4.83±1.96	2.72±0.49	1.47±0.11
S/N ratio	50.6±13.3	54.84±27.54	37.28±10.91	10.49±11.09
%CVmax	5.94±3.33	3.76±2.79	2.33±1.22	5.33±4.92
%CVmin	3.43±0.53	9.01±8.09	4.61±0.04	8.87±8.28