| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | DEERFIELD MANAGEMENT | 3,750,000 | 4.59 | $4,162,500 | 30-Sep-09 | | Weiss Multi-Strategy Advisers, LLC | 2,797,700 | 3.42 | $3,105,447 | 30-Sep-09 | | JAY, JEFFREY R. | 2,655,000 | 3.25 | $2,947,050 | 30-Sep-09 | | ORBIMED ADVISORS LLC. | 1,890,400 | 2.31 | $2,098,344 | 30-Sep-09 | | HARRIS (WILLIAM) INVESTORS, INC. | 1,800,000 | 2.20 | $1,998,000 | 30-Sep-09 | | JP MORGAN CHASE & COMPANY | 1,152,200 | 1.41 | $1,278,942 | 30-Sep-09 | | RENAISSANCE TECHNOLOGIES, LLC | 559,700 | .68 | $621,267 | 30-Sep-09 | | UBS AG | 476,906 | .58 | $529,365 | 30-Sep-09 | | CALPERS (CALIFORNIA-PUBLIC EMPLOYEES RETIREMENT SYSTEM) | 330,200 | .40 | $366,522 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 319,745 | .39 | $354,916 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | UBS EUCALYPTUS FUND LLC | 310,500 | .38 | $276,345 | 30-Jun-09 | | SPARTAN EXTENDED MARKET INDEX FUND | 35,986 | .04 | $40,664 | 31-Oct-09 |
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Value shown is computed using the security's price on the report date given.
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