Dear all,
	
suppose that I want to combine two Affymetrix datasets using
random-effect model. Suppose further that only preprocessed data are
available; first dataset was normalized according to MAS5 algorithm,
while the other one according to RMA algorithm.

Can I compute standardized mean differences (or any other effect size
statistic) separately for both studies and then combine them?

Any pointers on this issue would be greatly appreciated.

Best regard,

Andrej Kastrin

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