New York, February 18, 2016 -- The growing multitude of biosimilar products in clinical development presents challenges for branded biotech companies in the long term, including Amgen Inc. (Baa1 stable), AbbVie Inc. (Baa1 negative), Johnson & Johnson (Aaa stable) and Roche Holding AG (A1 stable), says Moody's Investors Service. Biosimilar products are follow-on versions of complex biotech drugs.
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