RT Journal Article
SR Electronic
T1 Observational cohort studies and well controlled clinical trials--we need them both!
JF The Journal of Rheumatology
JO J Rheumatol
FD The Journal of Rheumatology
SP 1476
OP 1477
VO 31
IS 8
A1 Daniel E Furst
YR 2004
UL http://www.jrheum.org/content/31/8/1476.abstract
AB