Current concepts of laparoscopic splenectomy in elective patients

Figure 2 Map of the terms selected (n = 420) from the records included (n = 1141) after searching in web of science^TM (records published in English during 1991-2013). The map was built by using the visualization of similarities approach. The terms in the title/abstract text corpus of each record were selected from 18145 terms by assuming the minimum number of term occurrences = 5; only the presence/absence of a term in a record was retained. The colors define the clusters of related items. The size of each circle is related to the number of occurrences.