Table 1.

Geographic locations of the study populations (n = 80)

Geographic area/country	Populations, no.	Ref.
Eastern Asia
China	5	61,81,82,88,89
Japan	14	4,49,50,60,62,65,68,70,79,84–86,91,92
Korea	5	47,51,57,58,72
Taiwan	1	33
Middle East/North Africa
Egypt	1	25
Iran	3	21,64,80
Iraq	1	23
Israel	3	24,31,45
Jordan/Palestine	2	28,87
Morocco	1	32
Saudi Arabia	1	90
Tunisia	2	46,48
Turkey	13	19,22,26,27,37,43,44,53,55,63,66,74,83
Southern Europe
France	1	40
Greece	3	54,77,94
Italy	6	29,39,71,73,75,78
Portugal	1	34
Spain	4	30,38,42,67
Northern/Eastern Europe
Germany	3	36,53,95
Ireland	1	52
Russia	3	20,41,76
UK	4	19,35,59,93
North America
Mexico	1	56
US	1	69