Funding for this research was provided by:
Ministry of Science and Technology, Taiwan (MOST 109-2636-B-007-006, MOST109-2636-B-007-004)
National Institute of General Medical Sciences (R35GM124715-02, U54GM088558)
Received: 3 August 2020
Accepted: 17 January 2021
First Online: 27 January 2021
Ethics approval and consent to participate
: This study received ethical approval from Research Ethics Committee of National Tsing Hua University (REC #: 10812HM119). Aggregated, anonymized data were analyzed, and no individuals were enrolled into this study. Written permission was granted by Facebook for this study to access this data.
: Not applicable.
: The authors declare that they have no competing interests.