Received: 10 January 2020
Accepted: 13 May 2020
First Online: 5 June 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethical Committee of the Mahidol University Institute Research Board (MU-CIRB COA. NO. 2018/079.0404). The participants were informed the study’s protocol and asked to sign the inform consent before data collection.
: Not applicable.
: The authors declare that they have no competing interests.