COR Clinical Research is a medical research facility that is dedicated to finding new medical treatments, medications and other options for treating diseases and disorders.

Fractionation Research, Inc. (FRI) is a non-profit research consortium supported by memberships which include many of the largest petroleum, chemical, and engineering companies in the world.?

Legacy Clinical Research conducts clinical trials in many different therapeutic areas. Our physicians and research professionals who conduct these trials are committed to providing you with quality patient care and medical attention.

In operation since 1989, the Lynn Health Science Institute (LHSI) is an innovative site for comprehensive medical research.

Red River Medical Research Center specializes in Phase 2, 3 and 4 clinical trials in psychiatry and neurology.

Regional Medical Laboratory is a nationally-renowned commercial pathology laboratory that provides testing services for thousands of physicians and hospitals within a four-state region.

Tulsa Clinical Research, LLC has participated in a large number of pivotal multicenter trials investigating areas such as Alzheimer’s disease, Parkinson’s disease, stroke, seizures, multiple sclerosis, painful neuropathy, narcolepsy, attention deficit disorder (ADHD), depression, anxiety, schizophrenia, migraine, AIDS, and various other conditions.