Author Contributions: Dr Staessen 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: Stolarz-Skrzypek, Kuznetsova, Kawecka-Jaszcz, Staessen.
Acquisition of data: Stolarz-Skrzypek, Kuznetsova, Tikhonoff, Seidlerová, Richart, Olszanecka, Malyutina, Casiglia, Filipovský, Nikitin, Staessen.
Analysis and interpretation of data: Stolarz-Skrzypek, Kuznetsova, Thijs, Jin, Staessen.
Drafting of the manuscript: Stolarz-Skrzypek, Staessen.
Critical revision of the manuscript for important intellectual content: Kuznetsova, Thijs, Tikhonoff, Seidlerová, Richart, Jin, Olszanecka, Malyutina, Casiglia, Filipovský, Kawecka-Jaszcz, Nikitin.
Statistical analysis: Stolarz-Skrzypek, Thijs, Tikhonoff, Casiglia, Staessen.
Obtained funding: Casiglia, Filipovský, Staessen.
Administrative, technical, or material support: Stolarz-Skrzypek, Kuznetsova, Richart, Malyutina, Filipovský, Kawecka-Jaszcz, Nikitin.
Study supervision: Tikhonoff, Casiglia, Filipovský, Kawecka-Jaszcz, Staessen.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: The European Union grants IC15-CT98-0329-EPOGH, LSHM-CT-2006-037093. InGenious HyperCare, and HEALTH-F4-2007-201550 HyperGenes supported the Studies Coordinating Centre (Leuven, Belgium) and the studies in Pilsen (Czech Republic), Padova (Italy), Kraków (Poland), and Novosibirsk (Russian Federation). The Studies Coordinating Centre also received grants G.0575.06 and G.0734.09 from the Fonds voor Wetenschappelijk Onderzoek Vlaanderen, Ministry of the Flemish Community, Brussels, Belgium, and the grants OT/00/25 and OT/05/49 from the Katholieke Universiteit Leuven, Belgium. The Polish Ministry for Science and Higher Education supported the fellowship of Dr Stolarz-Skrzypek in Leuven. The Czech Society of Hypertension provided additional funding to Dr Seidlerová.
Role of the Sponsor: The funding source had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript.
Additional Contribution: The authors gratefully acknowledge the expert assistance of Ms Sandra Covens and Ms Ya Zhu, who are employees of the Studies Coordinating Centre, Leuven, Belgium, and did not receive any compensation for their contribution to this study. The FLEMENGHO and EPOGH investigators at the time of the studies are listed at http://www.jama.com.