TY  - RPRT
TI  - Ambiguous relation between physical workload and low back pain: a twin control study.
AU  - J Hartvigsen
AU  - K O Kyvik
AU  - C Leboeuf-Yde
AU  - S Lings
AU  - L Bakketeig
PY  - 2003
DO  - 10.1136/oem.60.2.109
UR  - https://pubmed.ncbi.nlm.nih.gov/12554838/
ID  - 12554838
ER  -