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Table 2 Scenarios for leave one data set out validation

From: Meta-analysis of microarray data using a pathway-based approach identifies a 37-gene expression signature for systemic lupus erythematosus in human peripheral blood mononuclear cells

Scenario I

Scenario II

Scenario III

Scenario IV

Data set 1 (a and b)

Data set 2 (a and b)

Data set 1 (a and b)

Data set 1 (a and b)

Data set 2 (a and b)

Data set 3

Data set 3

Data set 2 (a and b)

Data set 3

Data set 4

Data set 4

Data set 4

Test: Data set 4

Test: Data set 1 (a and b)

Test: Data set 2 (a and b)

Test: Data set 3