Published Online: April 28, 2014. doi:10.1001/jamainternmed.2014.1175.
Study concept and design: Lüth, Fründt, Lohse.
Acquisition, analysis, or interpretation of data: Lüth, Fründt, Rösch, Schlee, Lohse.
Drafting of the manuscript: Lüth, Fründt, Rösch, Schlee.
Critical revision of the manuscript for important intellectual content: Lüth, Rösch, Lohse.
Statistical analysis: Lüth, Fründt, Schlee, Lohse.
Obtained funding: Lüth.
Administrative, technical, or material support: Lüth, Lohse.
Study supervision: Lüth, Rösch, Lohse.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by the Deutsche Forschungsgemeinschaft (grant LU B62/2-1) and the Federal Ministry of Health (grant 1501/544 01).
Role of the Sponsor: The sponsors 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: Moritz Tacke, MD (Department of Pediatrics, Ludwig-Maximilians University, Munich, Germany), Johannes Kluwe, MD, and Katharina Freadrich-Zimmermann, MD (Department of Medicine I, University Hospital Hamburg-Eppendorf), and Marina Nesselrode, MD (Department of Medicine III, University Hospital Hamburg-Eppendorf), collaborated on the study. Ulf Panzer, MD (Department of Medicine III, University Hospital Hamburg-Eppendorf), and Karl Wegscheider, PhD (Department of Medical Biometry and Epidemiology, University Hospital Hamburg-Eppendorf), provided administrative assistance in preparing the manuscript. No compensation was received by any of the persons listed.