| Authors’ contributions | KN | MT | TI | SM | KK | SM | YY | TT |
| Research concept and design | y | n | n | n | n | n | n | n |
| Collection and/or assembly of data | y | y | y | n | y | y | y | n |
| Data analysis and interpretation | y | y | y | y | y | y | y | n |
| Writing the article | y | n | n | n | n | n | n | n |
| Critical revision of the article | y | n | n | n | n | n | n | y |
| Final approval of article | y | y | y | y | y | y | y | y |