In order to characterize the relative location of Krox20-positive cells with respect to previously identified stem cell niches within the HF, we performed immunostaining of the skin from Krox20-GFP mice with bulge stem cell markers (K15 and CD34), an infundibulum marker (SCA1), and a junctional zone marker (LRIG1). This evidence concerns the gene KRT15 and hydrops fetalis.