Funding for this research was provided by:
Received: 27 October 2022
Accepted: 2 January 2023
First Online: 24 January 2023
: Patients were informed in written and oral form about the nature and conduct of the study. Patients participated voluntarily and provided written informed consent. The study was conducted in accordance with the Declaration of Helsinki [CitationRef removed] and was approved by the ethical committee of the medical faculty of the LMU Munich (reference number 17–317). Data were handled pseudonymously in accordance with the German data-protection act and are stored in the study center for ten years as stipulated by law.
: Not applicable.
: DI has edited a standard textbook about myofascial trigger points and gives acupuncture courses. The other authors declare no conflict of interest with regard to the content of this publication. KH participated in this research as a doctorate student and PB as a senior research assistant. All authors receive honoraria for teaching, lecturing at university hospitals and non-profit medical organizations as well as for authoring articles and book contributions.