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Dr Tony Mok:
This is an important question. The development of lung cancer therapy over the last twenty years is revolutionary, and it is because of biomarkers making it assessable for us to select the right drug for the patient. We start off with the story of the EGFR mutation that we all know and that we all test for now in patients with adenocarcinoma. That changed the paradigm. In addition to that, with the availability of an ALK inhibitor since 2014, we now also test for ALK. The number of genes we are testing for upfront is increasing. Apart from those, we now have a total of around ten different genetic abnormalities that we test for. Most of this already have some first-line information, even for uncommon mutations, like RET. We now have first-line data demonstrating improvement. We also have EGFR exon 20, an uncommon mutation, but then first-line chemotherapy and amivantamab is actually very useful. I think it has become standard practice that we do a whole panel including the ten or eleven genes so we can identify the patient from the beginning.