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. 2020 Oct 30;17(21):8013. doi: 10.3390/ijerph17218013

Table 3.

Bradford zones.

Zone Number Articles (%) Journals (%) Bradford Multipliers
1 51 (35%) 7 (9%)
2 46 (31%) 25 (30%) 3.6
3 50 (34%) 50 (61%) 2.0
Total 147 82 2.8