For example, Page et al. 9 have extensively characterized the contribution of numerous HF cell populations, including the bulge, and have shown that Lrig1+ve cells persist for up to a year in the healed IFE, whereas Ito et al. 3 showed depletion of HF‐derived cells of the K15+ve lineage within 20 days postwounding. The gene discussed is KRT15; the disease is hydrops fetalis.