3.1.2. Year of Publication

Included articles were published between January 2015 and August 2020. Eleven articles were published in 2017, 10 before 2017 and 20 after 2017. See Figure 2.

**Figure 2.** Number of publications from 2015 to 2020.

## 3.1.3. Study Design

Among the 41 publications, 80.5% were cross-sectional (*n* = 33), and 19.5% were prospective longitudinal studies (*n* = 8).
