Dr. David Crabtree at the Midwest Allergy Sinus Asthma and Respiratory specializes in respiratory conditions of all ages including young people. In an interview at 99-7 THE MIX Springfield, IL, he explains Chronic Obstructive Pulmonary Disease (COPD), and the medical advances in diagnosis and treatment. For more information, Dr. Crabtree is available for consultation through appointments with Midwest Allergy Sinus Asthma and Respiratory.