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Figure 1: PRISMA 2009 flow diagram. Of these, 3629 studies were retrieved after adjusting for duplicates and on applying the filters Figure 1 shows that the remaining 3514 studies were discarded after reviewing the title and abstracts it appeared that these articles clearly did not meet the criteria

Figure 1: PRISMA 2009 flow diagram. Of these, 3629 studies were retrieved after adjusting for duplicates and on applying the filters Figure 1 shows that the remaining 3514 studies were discarded after reviewing the title and abstracts it appeared that these articles clearly did not meet the criteria