Fig. 2

Term Map Visualisation from Abstracts of All 86 Final Eligible Abstracts. We created a term map showing the most relevant terms from the abstracts of all 86 final eligible articles. Out of 2238 terms, 220 met the threshold of five occurrences. Here, we visualised 60% of the most relevant terms, which amounted to 132 terms with 3315 links between the terms. Each circle represents a term from the various abstracts, and the lines connecting the circles represent the interrelatedness of different terms. The size of the circle represents the number of occurrences of the term. The closer the circles are to each other indicates a high co-occurrence of terms representing a topic. The term map is coloured according to publication year, with dark blue/purple circles indicating terms from the earliest publication in 1947 until 2012 transitioning to teal in year 2013–2014, then turquoise/green in 2015–2017, and thereafter yellow indicating terms from the most recent publications in year 2018–2019