Funding for this research was provided by:
German Society of Acupuncture and Neural Therapy
Received: 10 October 2017
Accepted: 5 November 2018
First Online: 27 November 2018
Ethics approval and consent to participate
: The study protocol was developed in accordance with the Declaration of Helsinki and approved by the Ethics Committee of the University of Duisburg-Essen, Germany (Approval number: 12–5208-BO). All participants gave their written informed consent before they were included in the study.
: All participants gave their consent for the publication of the anonymized quotes.
: The authors declare that they have no competing interests.
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