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Table 1 Anatomopathological comparisons. Anatomopathological comparisons and the number of libraries in each class (n = normal, a = astrocytoma grades II and III, g = glioblastoma, a 2 = astrocytoma grade II, a 3 = astrocytoma grade III). The symbol "O" represents samples of the first group, and "X" represents samples of the second group in Figures 2 and 3.

From: A feature selection approach for identification of signature genes from SAGE data

Comparison label Normal (2) Astrocytoma II (4) Astrocytoma III (9) Glioblastoma(9)
1 (normal × glio) O - - X
2 (normal × astro, glio) O X X X
3 (astro 2 × astro 3) - O X -
4 (astro 2 × astro 3, glio) - O X X
5 (astro 3 × glio) - - O X
6 (astro × glio) - O O X