Chia, Dennis Wen Jie
Kuan, Win Sen
Ho, Weng Hoe
Sim, Tiong Beng
Chua, Mui Teng http://orcid.org/0000-0002-6326-4914
Article History
Received: 6 September 2018
Accepted: 25 February 2019
First Online: 7 March 2019
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: All procedures performed in 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.
: Our study is a retrospective study. For this type of study, formal consent is not required.