Mek inhibition results in marked antitumor activity against metastatic melanoma patient-derived melanospheres and in melanosphere-generated xenografts. - Sette, Giovanni; Fecchi, Katia; Salvati, Valentina; Lotti, Fiorenza; Pilozzi, Emanuela; Duranti, Enrico; Biffoni, Mauro; Pagliuca, Alfredo; Martinetti, Daniela; Memeo, Lorenzo; Milella, Michele; De Maria, Ruggero; et al. (Journal of Experimental & Clinical Cancer Research (17569966), 2013)