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. 2020 Mar 10;12067:96–107. doi: 10.1007/978-3-030-45002-1_9

Table 1.

Distribution of research papers per database.

Database No of papers % of papers
IEEE 17 36%
PUBMED-NCBI 16 34%
ScienceDirect 4 9%
MDPI 2 4%
Springer 2 4%
Others 6 13%
Total 47 100%