Funding for this research was provided by:
Received: 28 December 2020
Accepted: 23 March 2021
First Online: 1 April 2021
: All methods included in the interview study were carried out in accordance with the Declaration of Helsinki. The study has been approved by the Ethics Committee of the Medical Faculty of the LMU Munich (Number: 017-12). Written informed consent was obtained from the participants for publication of their cases and any accompanying tables. A copy of the written consent is available for review by the editor of this journal.
: Not applicable.
: JK, ST, BL, JS and GM declare that they have no competing interests.