title: Hypothesis and empiricism.
authors.forename: R P
authors.initials: RP
authors.lastname: Bolande
mesh_terms: D002454:Cell Differentiation; D006801:Humans; D008544:Melanocytes / Q000166:cytology*; D009508:Nevus, Pigmented / Q000151:congenital* / Q000209:etiology / Q000473:pathology; D012880:Skin Pigmentation