Article History
Received: 5 June 2020
Revised: 20 July 2020
Accepted: 24 July 2020
First Online: 2 September 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The study was approved by the Bioethics Committee of Cho Ray hospital, Ho Chi Minh City, Vietnam (No. 15C/2011/BV-HĐĐĐ, dated 09 March 2011).
: Consent to participate: Informed consent was obtained from all individual participants included in the study.
: Patients signed informed consent regarding publishing their data and photographs.