Funding for this research was provided by:
Universidade de Macau (no. SRG2019-00164-ICMS)
Received: 26 November 2019
Accepted: 30 January 2020
First Online: 10 February 2020
Ethics approval and consent to participate
: Not applicable.
: All authors have provided consent for publication in the Journal of Chinese Medicine.
: The authors declare that they have no competing interests.