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    Upgrades & Downgrades History
    UPGRADES & DOWNGRADES HISTORY 
    DateResearch FirmActionFromTo
    2-Oct-13Robert W. BairdInitiatedOutperform
    30-Sep-13Chardan Capital MarketsInitiatedBuy
    14-Nov-12Stifel NicolausInitiatedHold
    9-Dec-11OppenheimerInitiatedOutperform
    24-Nov-09ThinkEquityInitiatedBuy
    8-Oct-09Brean MurrayInitiatedBuy
    25-Mar-09Merriman Curhan FordInitiatedBuy
    15-May-08Rodman & RenshawInitiatedMkt Outperform
    13-May-08RBC Capital MktsInitiatedOutperform
    30-Jun-05Hibernia Southcoast CapitalInitiatedBuy
    14-Jun-04Leerink SwannInitiatedOutperform
    1-Mar-04Brean MurrayInitiatedStrong Buy
    16-Apr-03Techvest LLCInitiatedBuy
    26-Sep-01Techvest LLCDowngradeBuyHold
    1-Jun-01Techvest LLCInitiatedBuy
    19-Jan-01PrudentialInitiatedStrong Buy

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