Researchers at the Palmer Center for Chiropractic Research (PCCR) clinic facility, 741 Brady St., Davenport, on the campus of Palmer College of Chiropractic, are looking for more than 200 people with low back pain in the Quad-City community to participate in a unique study. It focuses on the relationship between back pain and possible abnormal function of the supportive muscles in the back. The study begins January 12. Participants must have low back pain and be between 21 and 65 years of age.