RT Journal Article SR Electronic T1 Adding nails to the coffin of underpowered trials. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 2065 OP 2066 VO 32 IS 11 A1 Scott D Halpern YR 2005 UL http://www.jrheum.org/content/32/11/2065.abstract AB