Received: 28 May 2021
Accepted: 8 July 2021
First Online: 21 July 2021
: All participants in the study have been informed and have given their prior consent to be included in the study. This research has been approved by the ethical committee of the University Alfonso X El Sabio. The study protocol was carried out in accordance with the Declaration of Helsinki. Parents of children under 16 were invited to participate in the study and asked to provide informed consent. Patients aged 16 or over were asked to participate in the study and provided informed consent themselves.
: All participants in the study have provided their consent to the use of their data for scientific purposes, including images and videos. Informed consent to publish pictures were signed by participants. No pictures of under 16 were taken.
: The authors declare that they have no competing interests.