At the recent j.p.morgan health care conference in San Francisco,Howard Pien,CEO of embattled flu-vaccine maker Chiron Corp.,faced a less-than-friendly Wall Street crowd.During a presentation on Jan.12,Pien euphemistically called 2004 "a momentous" year for the Emeryville (Calif.) biotech,which had to withdraw from this season's flu market after British regulators shut down its manufacturing plant in Liverpool.
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