Funding for this research was provided by:
Hoc Mai Foundation
Hung Vuong Hospital
Received: 8 May 2017
Accepted: 1 March 2018
First Online: 7 March 2018
Ethics approval and consent to participate
: Ethical approval was granted by the Institutional Ethical Review Committee of Hung Vuong hospital in July 2014 (158 QD-BVHV). All participants provided written, informed consent prior to commencing the study.
: Not applicable
: The authors declare that they have no competing interests.
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