Funding for this research was provided by:
Ministry of Education - Singapore (R-154-000-A22-112)
National University of Singapore (R-154-000-648-646 and R-154-000-648-733)
Haridus- ja Teadusministeerium (IUT21-1)
Text and Data Mining valid from 2019-11-29
Received: 12 July 2019
Accepted: 9 October 2019
First Online: 29 November 2019
Ethics approval and consent to participate
: The specimens were collected with valid permits (see Acknowledgements).
: Not applicable.
: The authors declare that they have no competing interests.