TY  - GEN
AU  - Beynnon,Bruce D
AU  - Roos,Ewa
AU  - Lohmander,Stefan
AU  - Johnson,Robert J
TI  - Are validated questionnaires valid?
SN  - 0021-9355
PY  - 2006///0321
KW  - Outcome Assessment, Health Care
KW  - Reproducibility of Results
KW  - Surveys and Questionnaires
KW  - standards
N1  - Publication Type: Letter; Comment
UR  - https://doi.org/10.2106/00004623-200602000-00032
ER  -