Author Contributions: Dr Häuser had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Häuser, Üçeyler, Sommer.
Acquisition of data: Häuser, Bernardy, Üçeyler, Sommer.
Analysis and interpretation of data: Häuser, Bernardy, Üçeyler, Sommer.
Drafting of the manuscript: Häuser, Bernardy.
Critical revision of the manuscript for important intellectual content: Häuser, Bernardy, Üçeyler, Sommer.
Statistical analysis: Häuser, Bernardy.
Obtained funding: Häuser, Bernardy, Üçeyler.
Administrative, technical, or material support: Sommer.
Study supervision: Häuser, Sommer.
Financial Disclosures: The authors reported that none has been employed by pharmaceutical companies and that none has stock, options, grants, patents, or pending royalties. Dr Häuser reported receiving honoraria for educational talks from Lilly, Mundipharma, Pfizer, and Janssen-Cilag. Dr Häuser reported that he will receive consulting honoraria from Lilly and Pfizer. Dr Bernardy and Dr Häuser reported receiving travel grants for scientific conferences by Lilly and Pfizer. Dr Sommer reported receiving honoraria for educational talks from Boehringer Ingelheim, Genzyme, Pfizer, and Schwarz-Pharma.
Funding/Support: The study was supported by grants from the German Rheumatology League and German Fibromyalgia Association, German Ministry of Education and Research (Bundesministerium für Bildung und Forschung), German Research Network on Neuropathic Pain, and intramural funds of the University of Würzburg (Germany).
Role of the Sponsor: The sponsors had no role in the design and conduct of the study; in the collection, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.