Article History
Received: 12 February 2018
Accepted: 23 May 2018
First Online: 4 June 2018
Ethics approval and consent to participate
: Ethical approval was not required as this manuscript just involved four cases. The study was adhered to the tenets of the Declaration of Helsinki. Written informed consents were obtained from the patients before the surgery.
: Written informed consents for publication of the clinical details and accompanying images were obtained from the patients. A copy of the written consents is available for review by the Editor of this journal.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.