Table E1.

Expression of IgD and CD27 on CD23⁺ and CD23⁻ B cells

	CD23+ (range)	CD23− (range)
Total B cells
CD19+	65.1 (55.8-77.9)	34.9 (22.1-44.2)
Naive B cells
IgD+CD27−	89.2 (81.8-94.5)	42.9 (31.9-42.9)
Postswitch memory B cells
IgD−CD27+	1.1 (0.25-1.72)	8.9 (6.9-10.2)
Resting memory B cells
IgD−CD27−	9.2 (4.8-15.9)	47.1 (41.2-57.3)
Preswitch memory B cells
IgD+CD27+	0.5 (0.5-0.6)	1.1 (0.6-1.5)

The mean percentage of CD23⁺ and CD23⁻ cells was investigated in total B cells, as well as among naive (CD27⁻IgD⁺), postswitch memory (CD27⁺IgD⁻), resting memory (IgD⁻CD27⁻), and preswitch memory (IgD⁺CD27⁺) B cells.