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. 2017 Jul 1;34(1):143–155. doi: 10.1007/s12264-017-0152-z

Fig. 2.

Fig. 2

Human genetic studies for pain. A Strategies to identify pain-relevant genes by screening for rare congenic mutations with high effect size (e.g. congenital insensitivity to pain), or more common genetic variations with more modest effect size (e.g. polymorphisms). B Effects of GCH1 pain protective haplotype in various pain conditions. xx, homozygous carriers.