TABLE 3.

Laboratory levels and intralaboratory coefficients of variation^a

Cytokine	Reagent source and laboratoryb	Mean level (pg/ml)	Coefficient of variation (%)
TNF-α	A2	335	21.3
	C9	2,663	4.7
	D6	3,577	7.7
	K6	4,032	2.1
	C6	4,353	8.1
IFN-γ	I3	964	5.7
	A2	1,084	8.0
	K2	1,588	10.6
	D2	2,648	5.0
	C3	7,759	3.2
IL-2	C2	7.4	37.7
	K2	9.5	19.0
	L2	25.3	48.3
	G1	31.1	21.6
IL-10	D1	33	10.4
	G1	134	21.9
Rantes	I1	955	2.4
	C1	5,390	6.4
	D1	5,712	7.7
	K1	8,276	5.7

^aTriplicate sample data in study III. 

^bLetters indicate laboratories, and numbers indicate reagent sources (1, Biosource; 2, Endogen; 3, Immunotech; 6, Medgenix; 9, Innogenetics).