TABLE 2.

HIV-1 RNA levels obtained in the two laboratories by testing spiked plasma specimens containing known quantities of HIV-1 RNA

Sample no.	Log no. of copies/ml
	Input	Laboratory 1	Laboratory 2
1	6.00	5.80	5.91
2	6.00	5.78	5.93
3	6.00	5.84	6.08
4	5.00	4.96	4.96
5	5.00	4.94	4.91
6	5.00	4.90	5.30
7	4.00	4.00	4.30
8	4.00	3.94	4.34
9	4.00	4.08	3.95
10	3.00	3.18	3.20
11	3.00	2.95	2.52
12	3.00	2.80	3.00
13	2.00	2.45	2.67
14	2.00	1.38	1.46
15	2.00	<LDLa	<LDL

^aLDL, lower detection limit.