title: [Sun hat, skin cancer and vitamin D].
authors.forename: Klaus
authors.initials: K
authors.lastname: Johansen
mesh_terms: D006801:Humans; D008545:Melanoma / Q000209:etiology / Q000517:prevention & control; D012307:Risk Factors; D012878:Skin Neoplasms / Q000209:etiology / Q000517:prevention & control; D014466:Ultraviolet Rays / Q000009:adverse effects; D014808:Vitamin D Deficiency / Q000150:complications / Q000517:prevention & control