Methods
We performed a systematic search of the PubMed, EMBASE and Web of science databases to identify relevant articles from the inception of the database to October 2nd, 2020. The search strategy used in each database is elaborated in Supplementary File 1. Extracted citations were imported into Mendeley reference manager and screened for relevance. Screening was performed at two levels. At the first level, articles and abstracts were screened for relevance. At the second level, articles identified by title and abstract screening were subjected to full text review. A second manual search was performed to identify articles published after the initial search until publication. The PRISMA flow chart for inclusion of studies is described in Figure 1.