1. Ambiguous relation between physical workload and low back pain: a twin control study. Issue 2 (1st February 2003) Authors: Hartvigsen, J; Kyvik, K O; Leboeuf-Yde, C; Lings, S; Bakketeig, L Journal: Occupational and environmental medicine Issue: Volume 60:Issue 2(2003) Page Start: 109 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗