AMERIGROUP Corporation

ATC Healthcare Inc.

Acadian Ambulance & Air Med Services, Inc.

Adventist Health

Advocat Inc.

Alterra Healthcare Corporation

AmSurg Corporation

Amedysis, Inc.

AmeriSource Health Corporation

American Healthways, Inc.

American Lung Association

American Medical Association

American Medical Response, Inc.

American Red Cross

Applied Bioscience International, Inc.

Assisted Living Concepts, Inc.

Baptist Health Care Corporation

Beverly Enterprises, Inc.

Bon Secours Health System, Inc.

C.R. Bard, Inc.

COBE Laboratories, Inc.

Capital Senior Living Corporation

Caremark International Inc.

Caremark Rx, Inc.

Children's Comprehensive Services, Inc.

Children's Hospitals and Clinics, Inc.

Chronimed Inc.

Community Health Systems, Inc.

Community Psychiatric Centers

CompDent Corporation

CompHealth Inc.

Comprehensive Care Corporation

Continental Medical Systems, Inc.

Continuum Health Partners, Inc.

Coventry Health Care, Inc.

DaVita Inc.

Easter Seals, Inc.

Erickson Retirement Communities

Express Scripts Incorporated

Eye Care Centers of America, Inc.

Fresenius AG

Genesis Health Ventures, Inc.

Gentiva Health Services, Inc.

GranCare, Inc.

Group Health Cooperative

HCA - The Healthcare Company

Hazelden Foundation

Health Care & Retirement Corporation

Health Management Associates, Inc.

Health Risk Management, Inc.

Health Systems International, Inc.

HealthSouth Corporation

Highmark Inc.

Hooper Holmes, Inc.

Hospital Central Services, Inc.

Howard Hughes Medical Institute

Humana Inc.

Intermountain Health Care, Inc.

Jenny Craig, Inc.

Kinetic Concepts, Inc. (KCI)

LabOne, Inc.

Laboratory Corporation of America Holdings

Life Care Centers of America Inc.

LifePoint Hospitals, Inc.

Lifeline Systems, Inc.

Lincare Holdings Inc.

Manor Care, Inc.

March of Dimes

Marshfield Clinic Inc.

Matria Healthcare, Inc.

Maxicare Health Plans, Inc.

Mayo Foundation

McBride plc

Medical Management International, Inc.

Memorial Sloan-Kettering Cancer Center

Merit Medical Systems, Inc.

NSF International

New York City Health and Hospitals Corporation

New York Health Care, Inc.

NewYork-Presbyterian Hospital

NovaCare, Inc.

Operation Smile, Inc.

Option Care Inc.

Orthodontic Centers of America, Inc.

Oxford Health Plans, Inc.

PHP Healthcare Corporation

PacifiCare Health Systems, Inc.

Palomar Medical Technologies, Inc.

Pediatric Services of America, Inc.

Pediatrix Medical Group, Inc.

PhyCor, Inc.

PolyMedica Corporation

Primedex Health Systems, Inc.

Psychiatric Solutions, Inc.

Quest Diagnostics Inc.

Ramsay Youth Services, Inc.

Renal Care Group, Inc.

Res-Care, Inc.

Response Oncology, Inc.

Rural/Metro Corporation

SSL International plc

Sabratek Corporation

Salick Health Care, Inc.

Select Medical Corporation

Shriners Hospitals for Children

Sierra Health Services, Inc.

St. Jude Medical, Inc.

Stericycle Inc.

Sun Healthcare Group Inc.

Sunrise Senior Living, Inc.

SwedishAmerican Health System

Tenet Healthcare Corporation

The American Cancer Society

The Hillhaven Corporation

The Providence Service Corporation

The Scripps Research Institute

The Sports Club Company

The Susan G. Komen Breast Cancer Foundation

Twinlab Corporation

U.S. Physical Therapy, Inc.

Unison HealthCare Corporation

United HealthCare Corporation

United Nations International Children's Emergency Fund (UNICEF)

United Way of America

VCA Antech, Inc.

VISX, Incorporated

Vanguard Health Systems Inc.

Vencor, Inc.

Vivra, Inc.

Volunteers of America, Inc.

WellPoint Health Networks Inc.

YWCA of the U.S.A.