EPCAM and small cell lung carcinoma: Cultured H146 SCLC cells were spiked into whole blood, which was previously collected into EDTA tube but not CellSave tube, and then the spiked samples were processed by the CellSearch system (using the CellSearch Profile kit in which there is no fixative and staining reagents, with only CTC-capturing anti-EpCAM-coating ferrofluids provided) so as to enrich spiked unstained tumor cells.