About the Authors

Holger Cramer

h.cramer@kliniken-essen-mitte.de

Affiliation Department of Internal and Integrative Medicine, Kliniken Essen-Mitte, Faculty of Medicine, University of Duisburg-Essen, Essen, Germany

Carol Krucoff

Affiliation Duke Integrative Medicine, Duke University, Durham, North Carolina, United States of America

Gustav Dobos

Affiliation Department of Internal and Integrative Medicine, Kliniken Essen-Mitte, Faculty of Medicine, University of Duisburg-Essen, Essen, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HC GD. Performed the experiments: HC. Analyzed the data: HC CK. Wrote the paper: HC CK.