Ho, V. N. A.
Pham, T. D.
Le, A. H.
Ho, T. M.
Vuong, L. N.
Article History
Received: 2 May 2018
Accepted: 16 August 2018
First Online: 27 August 2018
Ethics approval and consent to participate
: This study retrospectively analyzed anonymized patient data and was exempt from ethical approval under Vietnamese law.
: Not applicable.
: The authors declare that they have no competing interests.
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