| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | JENNISON ASSOCIATES LLC | 1,548,482 | 5.61 | $4,846,748 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 762,285 | 2.76 | $2,385,952 | 30-Sep-09 | | MPM Asset Management, LLC | 5,364,572 | 19.45 | $16,791,110 | 30-Sep-09 | | LLOYDS TSB BANK PLC | 520,142 | 1.89 | $1,628,044 | 30-Sep-09 | | FRANKLIN RESOURCES, INC | 350,000 | 1.27 | $1,095,500 | 30-Sep-09 | | STATE STREET CORPORATION | 294,065 | 1.07 | $920,423 | 30-Sep-09 | | PRINCIPAL FINANCIAL GROUP, INC. | 275,000 | 1.00 | $860,750 | 30-Sep-09 | | DEUTSCHE BANK AKTIENGESELLSCHAFT | 261,056 | .95 | $817,105 | 30-Sep-09 | | DIKER MANAGEMENT, LLC | 181,189 | .66 | $567,121 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 145,068 | .53 | $454,062 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | JENNISON SECTOR FDS-JENNISON HEALTH SCIENCES FD | 1,317,200 | 4.77 | $4,531,168 | 31-Aug-09 | | ISHARES RUSSELL 2000 INDEX FD | 305,561 | 1.11 | $956,405 | 30-Sep-09 | | FRANKLIN STRATEGIC SERIES-FRANKLIN BIOTECHNOLOGY DISCOVE | 273,100 | .99 | $854,803 | 30-Sep-09 | | PACIFIC SELECT FUND-HEALTH SCIENCES PORTFOLIO | 231,282 | .84 | $955,194 | 30-Jun-09 | | ISHARES RUSSELL 2000 GROWTH INDEX FD | 160,550 | .58 | $502,521 | 30-Sep-09 | | Blackrock Funds-Health Sciences Opportunity Portfolio | 122,000 | .44 | $503,860 | 30-Jun-09 | | COLLEGE RETIREMENT EQUITIES FUND-STOCK ACCOUNT | 99,150 | .36 | $409,489 | 30-Jun-09 | | ISHARES Russell Micro Cap (TM) Index Fund | 34,748 | .13 | $108,761 | 30-Sep-09 | | SPARTAN EXTENDED MARKET INDEX FUND | 22,000 | .08 | $68,860 | 30-Sep-09 | | Blackrock Health Sciences Trust | 20,300 | .07 | $69,223 | 31-Jul-09 |
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Value shown is computed using the security's price on the report date given.
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