Author Contributions: Dr Zagrosek 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: Zagrosek, Dietz, Schulz-Menger.
Acquisition of data: Zagrosek, Messroghli, Schulz, Schulz-Menger.
Analysis and interpretation of data: Zagrosek, Messroghli, Schulz-Menger.
Drafting of the manuscript: Zagrosek, Schulz.
Critical revision of the manuscript for important intellectual content: Zagrosek, Messroghli, Dietz, Schulz-Menger.
Statistical analysis: Zagrosek, Messroghli.
Administrative, technical, or material support: Zagrosek, Schulz.
Study supervision: Dietz, Schulz-Menger.
Financial Disclosures: None reported.
Additional Contributions: Kerstin Kretschel, Evelyn Polzin, and Denise Kleindienst provided magnetic resonance technical assistance; Sascha Aiche, MD, provided help conducting the study; and Florian von Knobelsdorff-Brenkenhoff, MD, and Ralf Waßmuth, MD, provided careful reading of the manuscript. All are affiliated with the Clinic for Cardiology at Charité-Campus Buch. None of these persons received financial compensation for their roles in this study.