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Human dorsolateral prefrontal cortex tissue section triple-labeled for parvalbumin (PV, red), GAD65 (green), and GABAA receptor α1 subunit (blue) illustrating typical neuropil staining. Note the dual-labeled PV/GAD65 axonal boutons (yellow). For more info on this topic, please refer to the article by Glausier et al. on pages 30–36.