pembrolizumab
merck
['biomarker', 'keynote-604', 'sclc', 'lcsm,(-blcsm)']
 shared results of an exploratory biomarker study of the phase 3 keynote-604 study in es #sclc. more work req'd to id predictive biomarkers. #asco23 #lcsm key takeway: it s possible to get sclc tissue, we have to stop staying that it s not possible. 
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