Fig. 1. Identification of relevant studies based on the guidelines of Preferred Reporting Items for Systematic Reviews and Meta-Analyses 2020 (PRISMA 2020). Among 3,582 studies identify by database searching, we removed 1,016 studies that represented duplicated data. There were 68 studies left after screening the remaining 2,566 studies. After excluding 21 studies through a preliminary review, we evaluated whether the remaining 47 were eligible for inclusion in this systematic review by carefully assessing their full texts. We eventually included 13 studies in this review after removing 34 of the 47 articles for various reasons.
