Supplementary Table 2.

Culture time (days) of synovial cells in primary culture (collagenase digest), synovial fibroblasts, and skin fibroblasts from patients with rheumatoid arthritis, osteoarthritis, and joint trauma, or normal donors

		Synovial fibroblasts		Skin fibroblasts
	Synovial cells
Source of cells	(collagenase digest)	Passage 1	Passage 4	Passage 1	Passage 4
Rheumatoid arthritis	9.2 ± 3.3 (n = 5)	13.8 ± 1.8 (n = 9)	81.1 ± 9.9 (n = 7)	46.2 ± 20.7 (n = 6)	63.5 ± 19.5 (n = 2)
Osteoarthritis	8.1 ± 1.2 (n = 14)	13.9 ± 1.7 (n = 17)	91.4 ± 9.0 (n = 11)	18.0 ± 2.0 (n = 14)	62.4 ± 5.8 (n = 13)
Joint trauma	n.a.	28.0 ± 7.0 (n = 2)	n.a.	n.a.	n.a.
Normal subjects	n.a.	n.a.	n.a.	20.0 ± 8.9 (n = 3)	n.a.

Values are shown as means ± SEM. n.a. = not analyzed.