Table 2.

Index of cell number after co-culture¹

	Index
Cell fraction	Exp. 1	Exp. 2	Exp. 3	Exp. 4	Exp. 5
CD4+ CD25− cells	1·6	3·0	0·4	1·7	9·1
CD4+ CD25+ cells	2·8	5·1	2·6	3·6	16·6

Exp, experiment.

T cells were cultured with stromal cells and the cell number index of CD4⁺ CD25⁻ or CD4⁺ CD25⁺ cells was calculated.

¹Index of cell numbers was calculated compared with the control culture (without stromal cells).