PT  - JOURNAL ARTICLE
AU  - Daniel E Furst
TI  - Observational cohort studies and well controlled clinical trials--we need them both!
DP  - 2004 Aug 01
TA  - The Journal of Rheumatology
PG  - 1476--1477
VI  - 31
IP  - 8
4099  - http://www.jrheum.org/content/31/8/1476.short
4100  - http://www.jrheum.org/content/31/8/1476.full
SO  - J Rheumatol2004 Aug 01; 31