Table 3 Origin of included studies (N = 171)
Origin | Nº of studies | % |
|---|---|---|
USA | 54 | 31.6 |
Japan | 16 | 9.4 |
Spain | 10 | 5.8 |
UK | 10 | 5.8 |
Italy | 7 | 4.1 |
Taiwan | 7 | 4.1 |
France | 6 | 3.5 |
Australia | 4 | 2.3 |
Brazil | 4 | 2.3 |
Canada | 4 | 2.3 |
India | 4 | 2.3 |
Turkey | 4 | 2.3 |
Belgium | 3 | 1.8 |
China | 3 | 1.8 |
Germany | 3 | 1.8 |
Others * | 16 | 9.4 |
Others ** | 16 | 9.4 |
Total | 171 | 100 |