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* 1. Please list your first name, last name, and email:

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* 2. What is your specialty?

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* 3. How many patients with colorectal cancer do you treat each week?

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* 4. Which of the following colorectal cancer clinical trials report on the anti-EGFR therapy rechallenge & ctDNA use?

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* 5. Which of the following are known mechanisms of resistance post anti-EGFR therapy in patients with metastatic colorectal cancer?

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