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NYSE and AMEX quotes delayed by at least 20 minutes. NASDAQ delayed by at least 15 minutes. For a complete list of exchanges and delays, please click here.

UPDATE 4-Cell Therapeutics drug draws US FDA staff concerns

Mon Feb 8, 2010 4:43pm EST

* FDA staff raise issues with safety, effectiveness

* Pixantrone to be reviewed by advisory panel Wednesday

* Company says drug works, side effects manageable

* Shares fall nearly 40 pct (Updates shares, adds details on Novartis option)

By Lisa Richwine