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American Renal Associates Holdings, Inc. operates as a dialysis services provider in the United States. It operates dialysis clinics focusing on joint venture partnerships with physicians. The company offers kidney dialysis services to patients suffering from chronic kidney failure or end stage renal disease. As of December 31, 2019, it operated 246 dialysis clinics in partnership with 400 nephrologist partners treating approximately 17,300 patients in 27 states and the District of Columbia. The company was founded in 1999 and is headquartered in Beverly, Massachusetts.

HemaCare Corporation provides human-derived primary blood cells and tissues for biomedical research, and supporting cell therapy clinical trials and commercialization with apheresis collections in the United States. The company specializes in the customized collection, isolation, and testing of primary human blood cells and other biological products for research protocols and cellular therapy. It offers human blood cellular components derived from peripheral blood, bone marrow, and cord blood; and a range of consulting services in standard operating procedure development, personnel training, and quality and regulatory compliance. The company's network of FDA-registered, GMP/GTP-compliant collection centers ensures donor materials available to customers, as well as for use within its isolation laboratory. The company has strategic partnership with Charles River Laboratories International Inc. for human immune system research. HemaCare Corporation was founded in 1978 and is headquartered in Northridge, California.

Pacific Health Care Organization, Inc., together with its subsidiaries, provides specialty workers' compensation managed care services for self-administered employers, insurers, third party administrators, municipalities, and others in the United States. The company is involved in managing health care organizations (HCOs) and medical provider networks (MPNs); and negotiating legal agreements for the implementation of workers' compensation carve-outs for California clients/employers with collective bargaining units. It also offers HCO and MPN programs; medical case management services; and ancillary services, including utilization and medical bill review, lien representation, legal support, Medicare set aside, and network access services for workers' compensation claims. The company was formerly known as Clear Air, Inc. and changed its name to Pacific Health Care Organization, Inc. in January 2001. Pacific Health Care Organization, Inc. was incorporated in 1970 and is based in Newport Beach, California.