Author Contributions: Dr Ioannidis 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: Patsopoulos, Tatsioni, Ioannidis.
Acquisition of data: Patsopoulos, Tatsioni.
Analysis and interpretation of data: Patsopoulos, Tatsioni, Ioannidis.
Drafting of the manuscript: Patsopoulos, Ioannidis.
Critical revision of the manuscript for important intellectual content: Patsopoulos, Tatsioni, Ioannidis.
Statistical analysis: Patsopoulos, Tatsioni, Ioannidis.
Obtained funding: Ioannidis.
Study supervision: Ioannidis.
Financial Disclosures: None reported.
Funding/Support: Dr Patsopoulos was supported in part by a PENED grant sponsored by the EU European Social Fund and the Greek Ministry of Development–General Secretariat for Research and Technology.
Role of the Sponsor: The sponsor 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.