Updates are available Correction dated 2019-08-17

Article History

Received: 25 April 2019

Accepted: 31 May 2019

First Online: 25 June 2019

Change Date: 17 August 2019

Change Type: Correction

Change Details: Following publication of the original article [1], the authors reported errors in reference citations found in Table 1.

Ethics approval and consent to participate

: This study will be performed in accordance with the Declaration of Helsinki and was approved by the Ethics Committee of the Medical Faculty of the University of Lübeck (file number: 18–138). Potential study participants will receive an information sheet describing the purpose and procedure of the study, including the contact details of the project managers and the data protection measures. Consent to participate in the study will be obtained in writing. Only participant considered fit to give consent will be included in the study. All personal data (questionnaire data) will be pseudonymised in the clinic (provided with ID numbers). The assignment list (ID number and address) will be kept strictly separate from the questionnaire file and saved. Immediately after completion of the 9-month follow-up and after data control has taken place, this key file will be deleted and the data thus anonymised. The original documents will be kept in accordance with the Guidelines and Recommendations for Securing Good Epidemiological Practice (GEP) [] for up to 10 years after the end of the study.

: Not applicable as the manuscript does not contain any individual person’s data.

: The authors declare that they have no competing interests.