Received: 10 February 2021
Accepted: 29 April 2021
First Online: 15 May 2021
: This study was approved by the Medical Ethics Committee METC Z under registration number NL57207.096. All patients signed a written informed consent form prior to enrollment in our study. For the participants under the age of 18 years, informed consent from a parent for study participation was obtained. All methods were performed in accordance with the Declaration of Helsinki – Ethical principals for medical research involving human subjects (2018).
: S.H. gave informed to consent for publishing the photographs of the intervention techniques shown in the supplementary material.
: The authors declare that they have no competing interests.