Gefitinib is the first drug used for lung adenocarcinoma, which is correct. Many people won't do it because genetic testing is expensive and can't wait. In fact, you can blindly try afatinib. Afatinib has many targets and is effective for many targets, but in fact, we can try oxitinib first. If it doesn't work, we should consider the problem of intolerance, because afatinib has great side effects.
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