Table 2.
Years of publication.
| Year of publication | Included publications (N=56), n (%) |
| 2013 | 3 (5) |
| 2014 | 6 (11) |
| 2015 | 6 (11) |
| 2016 | 5 (9) |
| 2017 | 5 (9) |
| 2018 | 6 (11) |
| 2019 | 8 (14) |
| 2020 | 11 (20) |
| 2021 (until September 1) | 6 (11) |
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