A cough that continues for more than a couple of months is considered chronic. What are the most likely causes of chronic cough in non-smoking adults, other than asthma? Dr. Jason Knuffman, allergist in the department of allergy at Gunderson Lutheran Health System in LaCrosse, Wisconsin, discusses how to avoid some common pitfalls that are often encountered when evaluating and treating adults with chronic cough. Dr. Todd Mahr hosts.