Received: 16 March 2018
Accepted: 12 June 2018
First Online: 2 July 2018
Ethics approval and consent to participate
: Ethical committee of the Singapore General Hospital has previously approved the study. Consent to participate was obtained from patients even as the data obtained were for clinical service.
: Written informed consent was obtained from the patients for publication of individual details and images in the manuscript. The consent form is held in the patients’ clinical notes.
: The authors declare that they have no competing interests.
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