Exome Sequencing of Cell-Free DNA from Metastatic Cancer Patients Identifies Clinically Actionable Mutations Distinct from Primary Disease. - Butler, Timothy M.; Johnson-Camacho, Katherine; Peto, Myron; Wang, Nicholas J.; Macey, Tara A.; Korkola, James E.; Koppie, Theresa M.; Corless, Christopher L.; Gray, Joe W.; Spellman, Paul T. (PLoS ONE, 2015)