Table I.

Demographic data and peripheral B cells in patients and healthy donors, respectively

Donor	Diagnosis	Sex^a	Age (years)	WBC (Gpt/l)	Frequency of CD19⁺ Cells (%)	Total No. of CD19⁺ Cells (1 × 10⁶ cells/l)
1	Active SLE	f	40	5.51	3.8	209
5	Active SLE	f	43	3.6	6.9	248.8
6	Active SLE	f	36	10.9	4.4	480
10	Active SLE	f	31	5.6	9.7	543.2
11	Active SLE	f	22	9.1	0.7	63.7
13	Active SLE	f	40	4.05	2.6	105.3
2	SLE	f	61	4.25	1.5	64
3	SLE	f	56	9.3	2.6	241.8
4	SLE	f	33	9.61	2.8	269.1
7	SLE	m	41	6.2	0.8	50.0
8	SLE	f	32	12.4	2.1	260.4
9	SLE	m	22	7.0	2.8	196.0
12	SLE	f	53	4.81	3.4	163.5
14	Sjögren’s syndrome	f	72	7.2	2.0	144.0
15	Sjögren’s syndrome	f	17	5.3	6.3	334
16	Myositis	m	49	9.6	2.4	230.4
17	Myositis	m	55	7.32	5.1	373.3
18	Scleroderma	f	59	10.1	33.3	3363.3
19	Scleroderma	m	55	8.51	6.2	527.6
20	Polymyalgia rheumatic	f	59	7.63	3.4	259.4
21	Polychondritis	f	26	5.64	11.3	637.3
22	Inhibitory hemophilia A	f	64	6.4	5.9	377.6
23	Healthy control	f	57	6.2	9.5	589
24	Healthy control	f	31	4.5	6.9	310.5
25	Healthy control	f	63	9.8	8.2	803.6
26	Healthy control	m	34	5.6	8.5	476
27	Healthy control	m	19	10.2	7.4	754.8
28	Healthy control	m	64	7.3	8.4	613.2
29	Healthy control	m	24	5.9	9.7	572.3
30	Healthy control	m	21	5.2	10.6	551.2
31	Healthy control	m	19	6.3	7.2	453.6
32	Healthy control	f	39	4.9	10.5	514.5
33	Healthy control	m	37	8.4	7.0	588
34	Healthy control	m	38	6.2	6.2	384.4
35	Healthy control	f	35	12.3	9.9	1217.7
36	Healthy control	m	37	6.82	15.1	1029.8