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Table 6 Top 20 most productive countries in Lassa fever research

From: Bibliometric analysis of global Lassa fever research (1970–2017): a 47 – year study

Country No of documents %
United States 450 40.87
Undefined 261 23.71
United Kingdom 117 10.63
Germany 96 8.72
Nigeria 65 5.90
Sierra Leone 54 4.90
France 44 4.00
Canada 32 2.91
Switzerland 32 2.91
Netherlands 22 2.00
Guinea 21 1.91
Japan 21 1.91
Sweden 18 1.63
South Africa 17 1.54
Belgium 16 1.45
Italy 12 1.09
Liberia 12 1.09
Australia 10 0.91
India 10 0.91
China 9 0.82