Efficacy of combination therapy in rheumatoid arthritisComment on the review by Smolen et alKeystone, EdwardAletaha, DanielSmolen, Josef S.Author informationUniversity of Toronto, Toronto, Ontario, Canada (Keystone)Medical University of Vienna, Vienna, Austria (Aletaha, Smolen)Arthritis & Rheumatism 54(6):p 2034-2035, June 2006.Copyright © 2006, American College of Rheumatology