All articles in this issue were written/co-authored by 10 authors from 3 countries (Egypt, Malaysia, and Indonesia).

All articles in this issue were written/co-authored by 9 authors from 3 countries (Jordan, Chile, and Indonesia).

All articles in this issue are co-authored by 9 authors from just one country (Indonesia).

All articles in this issue are co-authored by 11 authors from just one country (Indonesia).

All articles in this issue are co-authored by 10 authors from just one country (Indonesia).