| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | PRICE (T.ROWE) ASSOCIATES INC | 1,258,932 | 7.87 | $16,303,169 | 30-Sep-09 | | PRIMECAP MANAGEMENT COMPANY | 674,700 | 4.22 | $8,737,365 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 645,890 | 4.04 | $8,364,275 | 30-Sep-09 | | AXA | 524,458 | 3.28 | $6,791,731 | 30-Sep-09 | | HARRIS (WILLIAM) INVESTORS, INC. | 474,326 | 2.96 | $6,142,521 | 30-Sep-09 | | ING Investment Management Company | 397,183 | 2.48 | $5,143,519 | 30-Sep-09 | | ING GROEP N.V. | 361,383 | 2.26 | $4,679,909 | 30-Sep-09 | | FMR LLC | 1,983,601 | 12.39 | $25,687,632 | 30-Sep-09 | | MFC Global Investment Management (U.S.), LLC | 312,645 | 1.95 | $4,048,752 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 306,924 | 1.92 | $3,974,665 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | FIDELITY SELECT PORTFOLIOS - MEDICAL EQUIPMENT & SYSTEMS | 771,500 | 4.82 | $9,990,925 | 30-Sep-09 | | FIDELITY SELECT PORTFOLIOS - HEALTH CARE | 563,300 | 3.52 | $7,294,735 | 30-Sep-09 | | PRICE (T.ROWE) HEALTH SCIENCES FUND | 450,000 | 2.81 | $4,068,000 | 30-Jun-09 | | PRICE (T.ROWE) SMALL CAP STOCK FUND | 437,200 | 2.73 | $5,661,740 | 30-Sep-09 | | Primecap Odyssey Aggressive Growth Fund | 315,000 | 1.97 | $4,079,250 | 30-Sep-09 | | JOHN HANCOCK SMALL CAP EQUITY FUND | 295,293 | 1.84 | $3,490,363 | 31-Oct-09 | | Primecap Odyssey Growth Fund | 288,100 | 1.80 | $3,730,895 | 30-Sep-09 | | Manning & Napier Maryland Life Sciences Series Fund | 283,194 | 1.77 | $2,560,073 | 30-Jun-09 | | EQ Advisors Trust-EQ/GAMCO Small Company Value Portfolio | 260,000 | 1.62 | $2,350,400 | 30-Jun-09 | | ISHARES RUSSELL 2000 INDEX FD | 231,792 | 1.45 | $3,001,706 | 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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