! U& `- J+ R3 q; p$ gStem cells of the human epidermis and their niche: Composition and function in epidermal regeneration and carcinogenesis. 5 h; y9 v' j& N1 y$ ]3 E* w$ p; ^3 [+ u0 o) i4 q
http://www.ncbi.nlm.nih.gov/pubmed/?term=Stem%20cells%20of%20the%20human%20epidermis%20and%20their%20niche%3A%20Composition%20and%20function%20in%20epidermal%20regeneration%20and%20carcinogenesis%20