Feb 29 (Reuters) -
* Moody's reviews Valeant's ratings for downgrade
* Moody's - review of Valeant for downgrade reflects concerns that co's
underlying operating performance is weaker than expectations
* Moody's-affirmation of SGL-2 rating reflects Valeant's good liquidity
stemming from low debt maturities relative to cash flow,revolver size
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