Document is current

Article History

Received: 13 May 2019

Accepted: 5 August 2020

First Online: 12 August 2020

Ethics approval and consent to participate

: All procedures performed in this study 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. An approval from the University of Santo Tomas Graduate School Institutional Ethics Committee Review Board was obtained (Protocol; number: G5-2015-173-R1) for this study.

: Not applicable.

: The authors declare that they have no competing interests.