Article History
Received: 16 July 2018
Accepted: 30 April 2019
First Online: 27 May 2019
Compliance with ethical guidelines
:
: A. Jaju, K. Rychlik and M.E. Ryan declare that they have no competing interests.
: All procedures performed in the studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. For this retrospective study, the informed consent requirement was waived by the Institutional Review Board. For images or other information within the manuscript which identify patients, consent was obtained from them and/or their legal guardians.