Figure 2: Forest plots: (a) Distribution of KRAS mutations in distal and proximal colorectal tumors. (b) Distribution of BRAF mutations in distal and proximal colorectal tumors. (c) Distribution of KRAS mutations in CpG island methylator phenotype-low/negative and CpG island methylator phenotype-high tumors. (d) Distribution of BRAF mutations in CpG island methylator phenotype-low/negative and CpG island methylator phenotype-high tumors. (e) Distribution of KRAS mutations in microsatellite instability-low/microsatellite stable and microsatellite instability-high tumors. (f) Distribution of BRAF mutations in microsatellite instability-low/microsatellite stable and microsatellite instability-high tumors. (g) Distribution of CpG island methylator phenotype-high tumors among distal and proximal colorectal tumors. (h) Distribution of microsatellite instability-high tumors among distal and proximal colorectal tumors. (i) Distribution of CpG island methylator phenotype-high tumors among microsatellite instability-low/microsatellite stable and microsatellite instability-high tumors