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Hello Steve, Would you mind elaborating a bit on the non-neural contributions to ALFF and fALFF? When you express concerns about the 'neuronal specificity' of these signals, is it because you are worried about potential cardio-respiratory artifacts or, perhaps, that non-neural brain cells may contribute to these signals (e.g., calcium waves in reactive astrocytes)? I would appreciate you thoughts on this. Thanks! Marco Loggia