Table 1.
Distribution of publications across countries over the years.
| Country | 1991--> | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | n | Ci | IF |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| U.S. | 28 | 1 | 2 | 1 | 1 | 2 | 2 | 1 | 38 | 1770 | 46.6 | |
| Germany | 11 | 1 | 1 | 13 | 420 | 32.3 | ||||||
| Japan | 10 | 1 | 1 | 12 | 237 | 19.8 | ||||||
| China | 3 | 1 | 1 | 1 | 6 | 102 | 17.0 | |||||
| Italy | 2 | 1 | 1 | 2 | 6 | 116 | 19.3 | |||||
| Denmark | 1 | 2 | 1 | 1 | 5 | 100 | 20.0 | |||||
| Netherlands | 4 | 1 | 5 | 131 | 26.2 | |||||||
| Canada | 1 | 1 | 1 | 3 | 79 | 26.3 | ||||||
| Poland | 3 | 3 | 57 | 19.0 | ||||||||
| Austria | 1 | 1 | 11 | 11.0 | ||||||||
| Belgium | 0 | 1 | 1 | 19 | 19.0 | |||||||
| Estonia | 1 | 1 | 11 | 11.0 | ||||||||
| Greece | 0 | 1 | 1 | 16 | 16.0 | |||||||
| Hungary | 0 | 1 | 1 | 13 | 13.0 | |||||||
| India | 0 | 1 | 1 | 10 | 10.0 | |||||||
| Portugal | 1 | 1 | 41 | 41.0 | ||||||||
| South Korea | 1 | 1 | 70 | 70.0 | ||||||||
| Taiwan | 1 | 1 | 21 | 21.0 | ||||||||
| n | 68 | 5 | 4 | 5 | 5 | 3 | 4 | 5 | 1 | 100 | 3224 | 32.2 |