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What to expect from the ASCO annual conference

The annual meeting of the American Society of Clinical Oncology (ASCO) begins today in Chicago. It's where pharma and biotech companies present their latest research on cancer treatments. It also tends to have a big effect on biotech stocks. Kennen MacKay, RBC Capital Markets Co-Head of Biotechnology Equity Research, joins Yahoo Finance's Julie Hyman, Adam Shapiro,