Because epidermal Wnt/β-catenin signaling is essential for HF morphogenesis and anagen induction (Alonso and Fuchs, 2003, Andl et al., 2002, Huelsken et al., 2001, Kobielak et al., 2003, Myung et al., 2013), we examined whether epidermal β-catenin activation would induce dermal Blimp1 expression in K14ΔNβ-cateninER mice (Supplementary Table S1, Supplementary Figure S6a, S6b online). Here, PRDM1 is linked to hydrops fetalis.