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Characteristics of the studies
| Ref. | Year | Paper title | CRC+ | CRC- | Number of genes |
| Han et al[12] | 2008 | Novel blood-based, five-gene biomarker set for the detection of colorectal cancer | 101 | 110 | 5 |
| Marshall et al[11] | 2010 | A blood-based biomarker panel for stratifying current risk for colorectal cancer | 202 | 208 | 7 |
| Quyun et al[10] | 2010 | Recent patents and advances in genomic biomarker discovery for colorectal cancers | 111 | 227 | 5 |
CRC+: Colorectal cancer cases; CRC-: Colorectal cancer controls.
