title: What goes down can go up.
authors.affiliation: Department of Pathology, University of California, San Francisco, California, USA.
authors.forename: Philip E
authors.initials: PE
authors.lastname: LeBoit
mesh_terms: D002465:Cell Movement; D003937:Diagnosis, Differential; D003875:Drug Eruptions / Q000175:diagnosis*; D006801:Humans; D015603:Keratinocytes / Q000473:pathology*; D008010:Lichen Planus / Q000175:diagnosis*