CXCR2 and Alzheimer disease: Immunostaining on paraffin sections of eight brain regions from two postmortem diagnosed “H” pathological level (A3B3C3) brains (Figs. 7B and S13A), and on hippocampal–entorhinal paraffin sections from six NC and two AD donors (Fig. S13B), confirmed the co-localization of Aβ42 and CXCR2.