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Bergström, Cecilia, Jan Hagberg, Lennart Bodin, Irene Jensen, ja Gunnar Bergström. Using a Psychosocial Subgroup Assignment to Predict Sickness Absence in a Working Population With Neck and Back Pain. BioMed Central, 2011.

Bergström, Cecilia, et al. Using a Psychosocial Subgroup Assignment to Predict Sickness Absence in a Working Population With Neck and Back Pain. BioMed Central, 2011.