Whilst no statistically significant associations were found at 6 and 12 months after HCT, a tendency for an increased recovery of Natural Killer (NK) cells, CD8+ TTE cells, and CD19+/CD20+ B-cells at 12 months was observed in the high versus low class I HED group (Figures 4A–C). Here, CD19 is linked to hypohidrotic ectodermal dysplasia.