PDGFRB and amyotrophic lateral sclerosis: Analysis revealed a statistically significant 19 % reduction in mean PDGFRβ-positive pericyte coverage of cervical anterior horn spinal cord capillaries in ALS subjects when compared to NNDCs (mean pericyte coverage: NNDC, 71 ± 3 %, n = 5 cases; ALS, 58 ± 3 %; n = 11 cases; for each control and ALS case six sections per case and five randomly selected fields per section were analyzed) (Fig. 4a, b).