Table 8. Individual data of serum concentration of MMP-9 in AVMs and healthy normal controls (ng/ml).

AVM	Serum MMP-9	Healthy control	Serum MMP-9
1	3.149	1	73.761
2	144.754	2	65.173
3	152.006	3	76.242
4	377.771	4	46.661
5	221.281	5	29.867
6	43.989	6	22.615
7	142.845	7	2.577*
8	127.96	8	0
9	158.113	9	69.371
10	52.768	10	0
11	118.418	11	64.219
12	98.761
13	70.516
14	88.456

^*Note: Serum from normal control 7 showed obvious hemolysis, the result was deleted when statistical analysis was conducted.