Lin, Cheng-Kuan http://orcid.org/0000-0002-3124-9402
Chen, Szu-Ta
Article History
Received: 3 May 2019
Accepted: 21 May 2019
First Online: 13 June 2019
Ethics approval and consent to participate
: Not applicable. No individual data is used in the letter.
: Not applicable. No individual data is used in the letter.
: We declared no competing interest.