Blood‐based detection of <i><scp>RAS</scp></i> mutations to guide anti‐<scp>EGFR</scp> therapy in colorectal cancer patients: concordance of results from circulating tumor <scp>DNA</scp> and tissue‐based <i><scp>RAS</scp></i> testingWolff Schmiegel, Stephen B. Fox, S Dooley et al.|Molecular Oncology|2017Cited by 161