Not sure what type of arthritis you have? Hear a comparison of key features and symptoms of psoriatic arthritis to rheumatoid arthritis, osteoarthritis and gout from Dr. Arthur Mandelin, a rheumatologist with Northwestern University, Feinberg School of Medicine in Chicago. This podcast is part of the PsA Action Month activities which is supported in part by Amgen, Bristol-Myers Squibb, Celgene, Lilly and Novartis.