About the Authors

Peter Tinnemann

Peter.Tinnemann@charite.de

Affiliation Institute for Social Medicine, Epidemiology and Health Economics, Charité University Medical Center, Berlin, Germany

Jonas Özbay

Affiliation Institute for Social Medicine, Epidemiology and Health Economics, Charité University Medical Center, Berlin, Germany

Victoria A. Saint

Affiliation Institute for Social Medicine, Epidemiology and Health Economics, Charité University Medical Center, Berlin, Germany

Stefan N. Willich

Affiliation Institute for Social Medicine, Epidemiology and Health Economics, Charité University Medical Center, Berlin, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: PT JÖ. Wrote the paper: PT JÖ VAS. Data acquisition and refinement: JÖ. Designed method: PT JÖ. Critical revision of manuscript: SNW.