Table I.

Characteristics of the studies included in the present meta-analysis.

First author	Year	Country	Case			Control			Refs.
			Wild	Leiden	Total	Wild	Leiden	Total
Bjorkman	2004	Sweden	54	9	63	271	11	282	8
Celik	2006	Turkey	10	1	11	35	4	39	9
Ekmekci	2006	Turkey	13	6	19	35	3	38	10
Glueck	1999	America	55	4	59	40	0	40	11
Glueck	2008	America	11	2	13	64	0	64	12
Glueck	2012	America	221	23	244	102	2	104	13
Zalavras	2004	Greece	59	13	72	286	14	300	14

Wild, wild homozygote, i.e., the genotype of GG; Leiden, carriers of rare alleles, i.e., the genotype of GA + AA.