| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | RENAISSANCE TECHNOLOGIES, LLC | 1,251,300 | 5.60 | $3,053,172 | 30-Sep-09 | | UBS AG | 742,898 | 3.32 | $1,812,671 | 30-Sep-09 | | LSV ASSET MANAGEMENT | 730,600 | 3.27 | $1,782,664 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 588,652 | 2.63 | $1,436,310 | 30-Sep-09 | | Roark, Rearden & Hamot Capital Management, LLC | 565,614 | 2.53 | $1,380,098 | 30-Sep-09 | | Credit Suisse/ | 558,502 | 2.50 | $1,362,744 | 30-Sep-09 | | HEALTHCOR MANAGEMENT LP | 4,413,657 | 19.75 | $10,769,323 | 30-Sep-09 | | BAKER BROTHERS ADVISORS, LLC | 3,461,175 | 15.49 | $8,445,267 | 30-Sep-09 | | BRIDGER MANAGEMENT LLC | 2,510,081 | 11.23 | $6,124,597 | 30-Sep-09 | | ORBIMED ADVISORS LLC. | 2,241,000 | 10.03 | $5,468,040 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | UBS EUCALYPTUS FUND LLC | 527,300 | 2.36 | $1,065,146 | 30-Jun-09 | | DFA U.S. SMALL CAP VALUE SERIES | 264,366 | 1.18 | $531,375 | 30-Apr-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 188,392 | .84 | $380,551 | 30-Jun-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 65,263 | .29 | $131,831 | 30-Jun-09 | | DFA TAX-MANAGED U.S. SMALL CAP PORTFOLIO | 36,551 | .16 | $75,660 | 31-Jul-09 | | ISHARES Russell Micro Cap (TM) Index Fund | 30,816 | .14 | $75,191 | 30-Sep-09 | | DFA U.S. Core Equity 2 Portfolio | 17,500 | .08 | $35,175 | 30-Apr-09 | | SPARTAN TOTAL MARKET INDEX FUND | 16,866 | .08 | $41,153 | 30-Sep-09 | | DFA U.S. Targeted Value Portfolio | 15,912 | .07 | $31,983 | 30-Apr-09 | | SPARTAN EXTENDED MARKET INDEX FUND | 15,229 | .07 | $37,158 | 30-Sep-09 |
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Value shown is computed using the security's price on the report date given.
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