Fig. 1

Flow diagram reflecting selection process of eligible studies included in meta-analysis. Initial literature search identified a total of 217 records from different online databases including Google Scholar, PubMed, ScienceDirect, Cochrane library and Embase. Of these, 155 overlapping studies (same studies that were indexed in two or more of these databases and resulted in redundant entries) were excluded, retaining 62 unique studies for further screening. Subsequent screening according to defined eligibility criteria yielded a total of 04 final studies including in this meta-analysis