John W. Littleton

Bio-Reference Laboratories, Inc. engages in the provision testing and related services to physicians, clinics, hospitals, long-term care facilities, employers, government units, and correctional institutions. It offers a list of chemical diagnostic tests, including blood and urine analysis, blood chemistry, hematology, services, serology, radio-immuno analysis, toxicology, pap smears, tissue pathology and other tissue analysis. The firm focuses on esoteric testing, molecular diagnostics, anatomical pathology, genetics, women's health, and correctional health care. The company was founded by Marc D. Grodman in 1981 and is headquartered in Elmwood Park, NJ.

Specialty Laboratories, Inc. provides clinical reference laboratory services. It focuses on cutting-edge research and development of existing diagnostic tests to produce assays. The company was founded in 1975 and is located in Valencia, CA.