Received: 7 September 2018
Accepted: 16 May 2019
First Online: 11 June 2019
Ethics approval and consent to participate
: An approval for this study was obtained from the Ethics Committee and Institutional Review Board of Chang Gung Memorial Hospital (IRB No. 104-9293B). The consent to participate was waived by the local ethical review board because this was a retrospective study.
: Written informed consent for publication of clinical images and details was obtained. A copy of the consent form is available for review by the Editor of this journal.
: All authors declare that they have no competing interests.
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