title: Years of sorafenib investigation in advanced non-small cell lung cancer: is there a 'NExUS' linking an unsuccessful treatment and a potentially active one?
authors.affiliation: Division of Medical Oncology, S. Maria della Misericordia Hospital, Azienda Ospedaliera di Perugia, via Dottori, 1, 06156 Perugia, Italy.
authors.forename: Giulio
authors.initials: G
authors.lastname: Metro
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Minotti
authors.forename: Lucio
authors.initials: L
authors.lastname: Crinò