MSLN and non-small cell lung carcinoma: We also measured MSLN expression in a normal human bronchial epithelial cell line (BEAS2B) and in five NSCLC cell lines and found that MSLN was not detected in non-cancerous BEAS2B cells but was clearly expressed in the NSCLC cell lines characterized by preferential BM capacity, such as in PC9, H460 and H226 cells (Fig. S1B) [24, 25].