About the Authors
- Peter Knaster, Hasse Karlsson
- Department of Psychiatry, Helsinki University Central Hospital, Helsinki, Finland
- Ann-Mari Estlander, Eija Kalso
- Pain Clinic, Helsinki University Central Hospital, Helsinki, Finland
- Jaakko Kaprio
- Hjelt Institute, Department of Public Health, University of Helsinki, Helsinki, Finland
The authors have declared that no competing interests exist.
Conceived and designed the experiments: EK AME JK PK HK. Performed the experiments: PK. Analyzed the data: PK JK. Contributed reagents/materials/analysis tools: EK AME PK. Wrote the paper: PK.