Text and Data Mining valid from 2019-06-01
First Online: 13 June 2019
Ethics approval and consent to participate
: This retrospective study has been approved by the Universiti Kebangsaan Malaysia Medical Centre (UKMMC) Research Ethics Committee. Administrative permission was obtained to retrive the data. The data were treated as anonymous data. Therefore, the patient privacy is well protected in this study.
: Not applicable.
: The authors declare that they have no competing interests.
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