PDGFRB and amyotrophic lateral sclerosis: Analysis showed approximately a 54 % reduction in PDGFRβ-positive pericyte number in ALS subjects when compared to NNDCs (mean pericyte number: NNDC, 750 ± 78, n = 5 cases; ALS, 350 ± 28, n = 11 cases; for each control and ALS case six sections per case and five randomly selected fields per section were analyzed) (Fig. 4c).