Database searching strategy
Electronic database searches were performed with EMBASE, Scopus, and
PubMed/Medline from inception to June 2020. In addition to these
databases, the bibliographies of relevant reports and Google Scholar
were also used to find studies. The searching keywords were applied
using a Boolean strategy (Supplementary Table 1). The searching
citations were limited to human-based reports and the English language.
In addition, the bibliographies of relevant studies and review articles
were manually searched.