Table 1. Genotype counts and allele frequencies for the S422L variant in European, Middle Eastern, Jewish non-Ashkenazi and Ashkenazi Jewish populations.

		KCNJ8 genotype
Country	N	CC	CT	TT	T allele frequency (%)
Europe
France	66	66	0	0	0.00
Germany	10	10	0	0	0.00
Netherland	68	68	0	0	0.00
Poland	27	27	0	0	0.00
Romania	27	27	0	0	0.00
Russia	24	22	0	0	0.00
Ukraine	40	40	0	0	0.00
Total	262	262	0	0	0.00
Middle East
Iran	42	42	0	0	0.00
Turkey	8	8	0	0	0.00
Total	50	50	0	0	0.00
Jewish non-Ashkenazi
Iran	20	20	0	0	0.00
Iraq	26	26	0	0	0.00
Turkey	25	25	0	0	0.00
Italy (Rome)	48	45	3	0	3.13
Total	119	116	3	0	1.26
Ashkenazi Jewish
France	35	29	6	0	8.57
Germany	9	8	1	0	5.56
Hungary	8	8	0	0	0.00
Netherlands	16	15	1	0	3.13
Poland	70	67	3	0	2.14
Romania	19	19	0	0	0.00
Russia	8	8	0	0	0.00
Ukraine	25	22	3	0	6.00
USA	101	92	9	0	4.46
Total	291	268	23	0	3.95