PT - JOURNAL ARTICLE AU - Theodore Pincus AU - Yusuf Yazici AU - Ronald van Vollenhoven TI - Why are only 50% of courses of anti-tumor necrosis factor agents continued for only 2 years in some settings? Need for longterm observations in standard care to complement clinical trials. DP - 2006 Dec 01 TA - The Journal of Rheumatology PG - 2372--2375 VI - 33 IP - 12 4099 - http://www.jrheum.org/content/33/12/2372.short 4100 - http://www.jrheum.org/content/33/12/2372.full SO - J Rheumatol2006 Dec 01; 33