Data collection and analysis
Three authors (A.S., S.T., and A. Su.) first conducted a calibration
exercise with 50 randomly selected records. We reviewed our
categorizations and identified any areas of disagreement to refine our
coding process. Then two authors (A.S. and S.T.) independently and in
duplicate assessed and categorized each citation against the index
citation using the definition of each outcome. These categorizations
were reconciled and any conflicts were discussed with a third author (A.
Su.). Metadata were also collected directly from WoS. These included
research area, article type, country of origin, and funding sources for
each article.
Proportions between categories were compared using Chi-squared or Fisher
Exact tests. All tests were two sided and p<0.05 was
considered statistically significant.