Figure 1

Study selection procedures for a meta-analysis of NKX2-3 polymorphisms and risk of CD or UC.
NKX2-3: NK2 transcription factor related and locus 3; CD: Crohn's disease; UC: ulcerative colitis.
Study selection procedures for a meta-analysis of NKX2-3 polymorphisms and risk of CD or UC.
NKX2-3: NK2 transcription factor related and locus 3; CD: Crohn's disease; UC: ulcerative colitis.