Sumner Esten Anderson

Deerfield Management Co. LP (Deerfield) is a SEC-registered investment advisor and hedge fund manager headquartered in New York City. The firm was founded by Peter Drake in 1994. They are wholly owned by James E. Flynn and are controlled by its general partner, Flynn Management LLC. Deerfield provides discretionary investment management services in the healthcare sector to domestic and offshore private pooled investment vehicles and their related alternative investment vehicles.

Endologix LLC engages in the research, development, manufacture, and trade of medical devices for the treatment of aortic disorders such as abdominal aortic aneurysms (AAA). Its products include AFX Endovascular AAA System, Nellix and Ovation. The company was founded in March 1992 and is headquartered in Irvine, CA.

Citadel Advisors LLC is a SEC-registered investment advisor and hedge fund manager headquartered in Miami, Illinois. The firm was founded in 1990 by Kenneth Griffin and is a wholly-owned by Citadel Advisors Holdings LP, ultimately held by GFH HFEVA LLC. Citadel Advisors manages private investment funds that are offered exclusively to sophisticated investors.

Wachovia Securities LLC offered equity, fixed income, and structured products. It was founded in 2001 and was headquartered in St. Louis, MO.

Founded in 1998, Thomas Weisel Partners (TWP) is a broker/dealer headquartered in San Francisco with offices in New York City, Boston, Denver, Colorado and Palo Alto, California. The firm is a subsidiary of Thomas Weisel Partners Group, Inc. (Nasdaq: TWPG), a San Francisco-based investment banking firm. Their ultimate parent is Stifel Financial Corp. (NYSE: SF). TWP's investment banking, brokerage and equity research divisions serve emerging growth companies and institutional investors around the world. They are a member of the NYSE, the SIPC and FINRA. TWP specializes in the growth sectors of the economy with a particular focus on the consumer, energy, healthcare, Internet, media/telecommunications, metals/mining and technology sectors. Within the consumer sector, the firm focuses on: financial products, gaming/lodging, interactive market services, lifestyles/sports retailers, restaurants and hardlines and softlines retailing. TWP's global energy research is provided by analysts in three countries and covers the following trends: (1) fast-growing oil and natural gas producers in North America and worldwide (2) domestic and international energy service companies and (3) alternative energy technology and resource developers. Within the healthcare sector, TWP focuses on: biotechnology, diagnostics, healthcare information technology, pharmaceutical services, life science technology, medical devices and specialty pharmaceuticals. The firm's interest in the Internet, media and telecommunications sector include: Internet services, media, broadcasting and telecommunications services. Their focus within the metals and mining sector include: base metals, gold, precious metals and uranium. TWP's technology research focuses on: (1) applied technologies (2) communications components (3) core and wireless communications equipment (4) IP networking communications equipment (5) electronic supply chain (6) enterprise hardware (7) information and financial technology services (8) semiconductor capital equipment (9) broadline and specialty semiconductors (10) applications and communications software and (11) infrastructure software. TWP also provides value-added equities analysis across a variety of sectors including: industrials, financials, consumer, technology and healthcare.

Millennium Management LLC is a SEC-investment advisor and hedge fund manager headquartered in New York City. The firm was founded by Israel 'Izzy' Englander in 1989 and is a subsidiary of MLM Trust B LLC, itself a subsidiary of MLM Trust B. Millennium Management provides discretionary investment advisory services to private investment funds.

Founded in 2007, PioneerPath Capital is a hedge fund manager located in New York City. The firm is a division of Citadel Alternative Asset Management and their ultimate parent is Citadel LP

Deerfield Management Co. LP (Private Equity) (Deerfield) is a private equity subsidiary of Deerfield Management Co. LP founded in 1994. The firm is headquartered in the New York.