Rheumatology Main11-20,Q 1,A 35-year-old man comes to the office for foilow-up of low back pain. He has aching pain in the left lumbar paraspinal area that is worse at the end of the day and relieved overnight with rest. The pain began 3 months ago without any precipitating trauma. The patient was initially treated with intermittent doses of acetaminophen and naproxen but continues to have moderate residual pain. There is no associated fever weight loss: radicular pain, lower extremity weakness,
