Received: 17 March 2019
Accepted: 6 June 2019
First Online: 3 July 2019
Ethics approval and consent to participate
: As the study is not a medical experiment (due to its survey-based nature) The Committee for Bioethics of the Medical University of Silesia in Katowice, Poland waived the need for ethics approval.Verbal informed consent was obtained from all participants. Before the surveys were distributed, the subjects were asked if they agreed to fill in a survey. The women were also informed that anyone refusing to fill in the survey should notify the person distributing the surveys of their choice. All the dancers in the study gave their consent to the survey and all accepted the survey questionnaires from the person distributing them and then returned them to the person who collected them afterwards.
: Not applicable.
: The authors declare that they have no competing interests.