By a GenomeWeb staff reporter

NEW YORK (GenomeWeb News) – Goldman Sachs today upgraded PerkinElmer and Affymetrix but downgraded Thermo Fisher Scientific.

In a report outlining its outlook for 2012 in the broad medical technology space, analysts Isaac Ro and David Roman upgraded the investment firm's rating for PerkinElmer to Buy from Neutral, saying changes it has made in recent years has left it well positioned in the coming year.

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