RT Journal A1 Zarins, Bertram T1 Are Validated Questionnaires Valid? JF The Journal of Bone & Joint Surgery JO The Journal of Bone & Joint Surgery YR 2005 FD August 1 VO 87 IS 8 SP 1671 OP 1672 DO 10.2106/JBJS.E.00554 UL http://dx.doi.org/10.2106/JBJS.E.00554 AB