TY - JOUR T1 - Observational cohort studies and well controlled clinical trials--we need them both! JF - The Journal of Rheumatology JO - J Rheumatol SP - 1476 LP - 1477 VL - 31 IS - 8 AU - Daniel E Furst Y1 - 2004/08/01 UR - http://www.jrheum.org/content/31/8/1476.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -