Survivin and angiotensin-converting enzyme polymorphisms with risk of colorectal cancer: a systematic review and meta-analysis

Table 1 Main characteristic of the eligible studies

First author	Year	Country	Ethnicity	Cases	Controls	Genotyping method
Survivin (−31 G/C)
Gazouli [16]	2009	Greece	Caucasian	312	362	PCR-RFLP
Huang [17]	2010	China	Asian	702	711	PCR-RFLP
Antonacopoulou [9]	2011	Greece	Caucasian	163	132	Taqman
Duan [18]	2012	China	Asian	206	129	PCR-RFLP
Liu [19]	2012	China	Asian	182	200	PCR-LDR
Li [20]	2013	China	Asian	275	270	PCR-RFLP
ACE (I/D)
Nikiteas [21]	2007	Greece	Caucasian	92	102	PCR
Rocken [22]	2007	Germany	Caucasian	141	189	PCR
Van der [23]	2008	Netherlands	Caucasian	176	6,015	PCR
Toma [24]	2008	Romanian	Caucasian	108	150	PCR
Liu SY [25]	2011	China	Asian	241	299	PCR-PAGE

ISSN: 1477-7819