Psychological predictors of change in the number of musculoskeletal pain sites among Norwegian employees: a prospective study

Christensen, Jan Olav; Johansen, Sissel; Knardahl, Stein
BMC Musculoskeletal Disorders BMC Musculoskeletal Disorders 18(1)
http://dx.doi.org/10.1186/s12891-017-1503-7