Table 1. Statistics of the article retrieval process.

Keyword	Web of Science	Scopus	PubMed	ACM Digital Library	IEEE Xplore	Springer -Link	Total count
Query 1a	161	68	75	15	15	8	342
Query 2b	14	0	4	1	2	1	22
Query 3c	14	0	0	0	0	1	15
References from Henry & McInnes (2017)							96
Total Article count							475

Notes.

^a“literature based discovery” OR “literature based discoveries”

^b“literature based knowledge discovery” OR “literature based knowledge discoveries”.

^c“literature related discovery” OR “literature related discoveries”.