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Article History

Received: 28 November 2018

Accepted: 6 March 2019

First Online: 14 March 2019

Ethics approval and consent to participate

: This study protocol follows the Standard Protocol Items: Recommendations for interventional trials (SPIRIT) 2013 checklist for recommended items to address in a clinical trial protocol and related documents [].The Study is approved by the Danish Data Protection Agency (Region of Southern Denmark 2008-58-0035 project no. 17/46074). The study has been submitted for approval at the Danish Ethical Committee (Project-ID: S-20170148) but was excluded for approval on account of it being a questionnaire survey only.All the treatment centers gave permission for the study to take place in their center.When CSOs contact the treatment Centers, they will be informed by the therapist, both orally and in writing, about the procedures for attending the study. The CSOs must sign the informed consent document in order to participate in the study.

: Not applicable.

: The authors declare that they have no competing interests.

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