TY  - JOUR
AU  - Waddell, G., McCulloch, J. A., Kummel, E., & Venner, R. M.
DO  - https://doi.org/10.1097/00007632-198003000-00005
IS  - 2
L1  - internal-pdf://2963103075/Waddell et al_1980_Nonorganic Physical Signs i.pdf
PY  - 1980
SP  - 117–125
ST  - Nonorganic physical signs in low-back pain
T2  - Spine
TI  - Nonorganic physical signs in low-back pain
VL  - 5
ID  - 143
ER  -