Figure 1.
The Scopus pathway starts with Criteria 1, containing 8,473 documents. Criteria 2 reduces this to 5,396 documents. Criteria 3 reduces the total to 2,300 documents. Criteria 4 reduces it to 166 documents. The W O S pathway starts with Criteria 5, containing 94 documents. Criteria 6 reduces this to 53 documents. These 53 documents merge into the Scopus pathway at Criteria 4. Criteria 7 then reduces the combined set to 136 documents. Criteria 8 reduces it to 32 documents. The final box contains documents studying external factors influencing I C, with 32 documents.Flow diagram followed for the literature review