Funding for this research was provided by:
Werner H. Spross-Stiftung (NA)
Stiftung wissenschaftliche Forschung, Fonds Ophthalmologie am Stadtspital Triemli (NA)
Text and Data Mining valid from 2019-05-28
Received: 16 March 2019
Accepted: 6 May 2019
First Online: 28 May 2019
Ethics approval and consent to participate
: According to the statement of the cantonal ethics committee, this review does not fall within the scope of the Human Research Act (HRA), and therefore, an authorization is not required (reference number: 2019-00152).
: All four patients gave their written consent to publish their image material.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.