Bayer has launched a consolidation review for its worldwide ad business, with spending pegged at $1 billion. Omnicom Group's BBDO Worldwide, in New York and Chicago, currently is Bayer's lead creative shop. WPP Group's JWT reps Berocca, a vitamin and mineral pill, in Europe. And Interpublic Group's Initiative is in charge of media planning and buying for Bayer Consumer Healthcare.
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