ROS1 and non-small cell lung carcinoma: In a previous study, we retrospectively validated a multiplexed RNA-based nCounter codeset for the detection of ALK, ROS1, and RET fusion transcripts in formalin-fixed and paraffin embedded (FFPE) samples from patients with advanced NSCLC and proved its advantage compared with standard diagnostic assays—immunohistochemistry (IHC) and fluorescent in situ hybridization (FISH) [23].