WASHINGTON, Dec 5 (Reuters) - U.S. regulators remain concerned about serious risks from a class of asthma drugs and will ask U.S. advisers next week if approval for treating the lung disease should be revoked, documents released on Friday said.
WASHINGTON, Dec 5 (Reuters) - U.S. regulators remain concerned about serious risks from a class of asthma drugs and will ask U.S. advisers next week if approval for treating the lung disease should be revoked, documents released on Friday said.
