QUESTION: I collected all the data from fMRI and PET studies related to [...]. How do I find the "mean1" and "sd1" variables in my literature, to do the "Globals" analysis, and is it really necessary for the meta-analysis?

ANSWER: Variables "mean1" and "sd1" are only needed for the "Globals" analysis, which is completely optional and it may be useful for VBM but not for other neuroimaging modalities.