Table 1.

Basic characteristics of eligible studies in the present meta-analysis

First author	Year	Country	Ethnicity	Sample size (case/control)	Genotyping method
Leibovici et al.	2005	United States	Caucasian	465/450	TaqMan
Ahirwar et al.	2008	India	Asian	136/200	ARMS-PCR*
Guey et al.	2010	Spain	Caucasian	1,017/1,065	TaqMan
Wu et al.	2013	Taiwan	Asian	300/594	PCR-RFLP
Ebadi et al.	2014	Iran	Asian	261/251	PCR-RFLP
Gautam et al.	2016	India	Asian	232/250	Sequencing

^*ARMS-PCR: Amplification refractory mutation system-polymerase chain reaction.