title: By the way, doctor. Would you please tell me what it means when fingernails have vertical or horizontal lines?
authors.forename: Kenneth
authors.initials: K
authors.lastname: Arndt
mesh_terms: D006801:Humans; D009262:Nails / Q000033:anatomy & histology* / Q000254:growth & development / Q000473:pathology; D013997:Time Factors