In collaboration with WHO and ILO a joint methodology for estimating the burden of work-related diseases and injuries, to produce the first joint WHO/ILO estimates of the effect of occupational ergonomic factors on musculoskeletal disorders (MSDs), except low back pain. This joint methodology will include the existing estimation methodologies of WHO and ILO for selected pairs of risk factors and outcomes. It will also add new methodologies for estimating the burden attributed to occupational ergonomic factors and MSDs.