Data have been normalized and are supplied, here, as a matrix.
References
Molecular Classification of Cancer: Class Discovery and Class Prediction by
Gene Expression Monitoring, Science, 531-537, 1999, T. R. Golub and
D. K. Slonim and P. Tamayo and C. Huard and M. Gaasenbeek and J. P. Mesirov
and H. Coller and M.L. Loh and J. R. Downing and M. A. Caligiuri and
C. D. Bloomfield and E. S. Lander