What is the sentiment of this news? Please choose an answer from {strong negative/moderately negative/mildly negative/neutral/mildly positive/moderately positive/strong positive}.
Text: Volume growth from Amgen's (AMGN) key drugs like Prolia, Kyprolis, Repatha and others and biosimilars portfolio is expected to have been partially offset by biosimilar/generic competition for mature drugs.
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mildly negative
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