Table 1. Population copy number frequencies.

YRI = Yoruba from Ibadan, Nigeria, CHB = Chinese from Beijing, JPT = Japanese from Tokyo. Significance threshold p<0.01

a) FCGR3A
copies	JPT	CHB	YRI	Ceph	UK
1	0	1	1	3	1
2	28	26	33	98	73
3	3	5	1	9	5
4	1	0	0	0	0
n	32	32	35	110	79

b) FCGR3B
copies	JPT	CHB	YRI	Ceph	UK
1	2	3	5	5	3
2	19	19	30	97	69
3	11	9	0	6	6
4	0	1	0	2	1
n	32	32	35	110	79

c) Total FCGR3
copies	JPT	CHB	YRI	Ceph	UK
2	0	1	0	0	0
3	2	2	6	8	4
4	19	15	28	86	63
5	7	12	1	14	11
6	3	2	0	1	1
7	1	0	0	1	0
n	32	32	35	110	79