In previous studies, PDGFRB immunostaining was used to assess microvasculature, showing a reduction of PDGFRB‐positive pericytes and a breakdown of the blood‐brain barrier in vascular cognitive impairment and some neurodegenerative diseases, including AD and ALS 46, 51, 55, 56, 59. The gene discussed is PDGFRB; the disease is Alzheimer disease.