Candidates will be screened with medical history/physical examination, routine laboratory tests, and questionnaires. The physical examination may include the standardized tender point assessment as specified in the American College of Rheumatology (ACR) to diagnose fibromyalgia, measurements of pain (allodynia, hyperalgesia, and hyperpathia), edema, autonomic dysfunction (altered skin color, temperature, or sudomotor activity), and extent of musculoskeletal dysfunction. It will also assess the patients level of pain, fatigue, and quality of life by providing questionnaires for the patients to complete. When the screening is completed, patients will be informed of their options to participate in other NINR interventional or observational clinical research studies. Patients who are not eligible for these studies will be informed of alternative treatments. No treatment is offered under this protocol. Information collected in this protocol will be used to determine eligibility to other NINR protocols.