Media type: E-Article Title: Psychological predictors of change in the number of musculoskeletal pain sites among Norwegian employees: a prospective study Contributor: Christensen, Jan Olav; Johansen, Sissel; Knardahl, Stein Published: Springer Science and Business Media LLC, 2017 Published in: BMC Musculoskeletal Disorders, 18 (2017) 1 Language: English DOI: 10.1186/s12891-017-1503-7 ISSN: 1471-2474 Origination: Footnote: Access State: Open Access