Text and Data Mining valid from 2018-07-31
Received: 12 March 2018
Accepted: 22 July 2018
First Online: 31 July 2018
Ethics approval and consent to participate
: Institutional review board approval with waiver of informed consent of individual patients was obtained for this retrospective non-interventional study (The University of Hong Kong/ Hospital Authority Hong Kong West IRB: UW 15–315).
: Not applicable.
: All authors declare that they have no competing interests.
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