Received: 22 September 2020
Accepted: 21 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: Ethics approval was waived via formal enquiry with the Singhealth Centralised Institutional Review Board (CIRB). This was in accordance with published institutional review board guidelines. Please refer to Supplementary Material Files InternalRef removed & InternalRef removed for information.
: Consent was sought and obtained from the patient prior to use of de-identified patient data for academic and educational purposes, including journal publication.
: The authors declare that there are no conflicts of interest or competing interests, commercial or otherwise, involved in this manuscript.