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Article History

Received: 20 March 2018

Accepted: 30 July 2018

First Online: 6 August 2018

Ethics approval and consent to participate

: Written informed consent was obtained from the parents of the patients regarding the use of the samples for research purpose. The procedure was part of the patient’s care and posed no additional risk to the patients’ health. No identifiable information of the patients or their families was disclosed in our research. The study design was reviewed and approved by the Ethical board of Vinmec International Hospital. The study conformed with the Declaration of Helsinki regarding the use of human samples and identifiable information.

: Not applicable.

: The authors declare no conflict of interest.

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