Funding for this research was provided by:
Chulalongkorn University (the Chulalongkorn Academic Advancement Fund into Its 2nd Century Project of Chulalongkorn University (2300042200), Center of Excellence grant (GCE 6100930004-1))
Text and Data Mining valid from 2019-07-10
Received: 16 April 2019
Accepted: 25 June 2019
First Online: 10 July 2019
Ethics approval and consent to participate
: Not applicable.
: All consents for publication were used with our institutional consent form and were obtained from that person, or their legal guardian.
: The authors declare that they have no competing interests.