Submitted for Publication: December 10, 2014; final revision received February 28, 2015; accepted March 24, 2015.
Published Online: May 13, 2015. doi:10.1001/jamapsychiatry.2015.0546.
Study concept and design: E. Andersson, Hedman, Ljótsson, Svanborg, Mataix-Cols, Kaldo, G. Andersson, Lindefors, Rück.
Acquisition, analysis, or interpretation of data: E. Andersson, Hedman, Enander, Radu Djurfeldt, Ljótsson, Cervenka, Isung, Svanborg, Mataix-Cols, Kaldo, G. Andersson, Rück.
Drafting of the manuscript: E. Andersson, Hedman, Enander, Radu Djurfeldt, Ljótsson, Svanborg, Kaldo, Rück.
Critical revision of the manuscript for important intellectual content: E. Andersson, Hedman, Radu Djurfeldt, Ljótsson, Cervenka, Isung, Mataix-Cols, Kaldo, G. Andersson, Lindefors, Rück.
Statistical analysis: E. Andersson, Hedman, Ljótsson, Rück.
Obtained funding: E. Andersson, Mataix-Cols, Rück.
Administrative, technical, or material support: E. Andersson, Hedman, Radu Djurfeldt, Svanborg, Kaldo, Rück.
Study supervision: E. Andersson, Enander, Radu Djurfeldt, Mataix-Cols, G. Andersson, Lindefors, Rück.
Conflict of Interest Disclosures: Drs Hedman and Ljótsson are shareholders of Dahlia, a company specializing in psychiatric symptom assessment. Dr Ljótsson is additionally a consultant for Almirall. Dr Cervenka has received grant support from AstraZeneca as coinvestigator and has served as a one-off speaker for Roche and Otsuka Pharmaceuticals. No other disclosures were reported.
Funding/Support: This study was supported by the Swedish Research Council and the regional agreement on medical training and clinical research between Stockholm County Council and Karolinska Institutet.
Role of the Funder/Sponsor: The funders had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: Sahar Gaveli, MSc, and Julia Boberg MSc, Karolinska Institutet, Stockholm, Sweden, provided administrative assistance; they received compensation from Karolinska Institutet. Monica Hellberg, RN, Stockholm County Council, Stockholm, also provided administrative assistance; she received compensation from Stockholm County Council.