File format for mapped data, i.e., Entrez Gene Ids with / without expression values

The data file must be in a Comma Separated Value File format; with each field separated by a comma (","). Values in the first row are assumed to be column labels and will not be used in the analysis. The second column, which is optional, should contain expression values of the corresponding probes.

An example of a mapped data file containing Entrez Gene Ids is shown below:

Gene_Id,	Expression Level
24161,	221.22842
24165,	4.6195445
500012,	31.342629
361401,	66.80963
619577,	3198.0783
619581,	1338.5287