The publishing and editorial teams would like to thank the following, for their invaluable service as 2021 reviewers for this journal. We are very grateful for the contributions made. With their help, the journal has been able to publish such high-quality articles:
| Acheampong, Prince |
| Adhikariparajuli, Mahalaxmi |
| Adu, Abraham |
| Agyei-Boapeah, Henry |
| Ahmed, Dr Ahmed Hassan |
| Al Lawati, Hidaya |
| Alam , Dr Ashraful |
| Alazzani, Dr. Abdulsamad |
| Albet, Mahe |
| Aljinovic Barac, Zeljana |
| Ashfaq, Khurram |
| Assidi, Sofien |
| Aydin, Necati |
| Bampinas, George |
| Ben Gamra, Souha |
| Berniak-Woźny, Justyna |
| Bhuiyan, Md Borhan |
| Boateng, Agyenim |
| Borgi, Hela |
| Chae, SooJoon |
| Chakhovich, Terhi |
| Cheema, Muhammad A. |
| Chen, Kejing |
| Chen, Xin |
| Chi, Daniel |
| Cho, Moon Kyung |
| Chookhiatti, Sarun |
| Chui, Lawrence |
| Cordery, Carolyn |
| Dai, Tianjing |
| Daly, Abbie |
| Dayanandan, Ajit |
| Diab, Ahmed |
| Drogalas, George |
| El-Halaby, Sherif |
| Elamer, Ahmed |
| Elbardan, Hany |
| Elberry, Noha |
| Eldaly, Mohamed Khaled |
| Eliwa, Yasser |
| Elmahgoub, Mohamed |
| Elmghaamez, Ibrahim |
| Foroudi, Pantea |
| Gallego-Sosa, Clara |
| Gerged, Ali |
| Gimeno, Ricardo |
| Goh, Jaimin |
| Gyimah, Daniel |
| Hussainey, Khaled |
| Hussien, Mostafa |
| Ilter, Cenap |
| Isaboke, Cyrus |
| Järvenpää, Marko |
| Kahyaoglu, Sezer Bozkus |
| Kleinman, Gary |
| Kolade, Nasir Abimbola |
| Korotin, Vladimir |
| Koulikidou, Kleopatra |
| Kuti, Mónika |
| Lazos, Grigorios |
| Ledyaeva, Svetlana |
| Li, Shihong |
| Lin, Yi-Hung |
| Lu, Deng |
| Lutz, Prof. Stefan |
| Mascha, Maureen |
| Masud, Md. Abdul Kaium |
| Mauro, Sara Giovanna |
| Muqattash, Riham |
| Nasir, Muhammad Ali |
| Nave, Juan |
| Oyewo, Babajide |
| Palazzo, Maria |
| Paramati, Sudharshan |
| Paz, Veronica |
| Pazzi, Silvia |
| Peng, Songlan |
| Pinho, Joaquim Carlos |
| Pirgaip, Burak |
| Pliakos, Konstantinos |
| Powpaka, Samart |
| Reis, Pedro |
| Ruan, Wenjuan |
| Saeudy, Mohamed |
| Saleh, Ahmed |
| Salma, Ummya |
| Savaraj, Lovepon |
| Serrasqueiro, Zélia |
| Shahzad, Faisal |
| Thirathon, Usarat |
| Tingbani, Ishmael |
| Tsinaslanidis, Prodromos |
| Vieira, Elisabete |
| Wang, Meng |
| Wang, Yan |
| Wong, Man Kong |
| Yousef, Hesham |
| Yuen, Desmond |
| Zakari, Abdulrasheed |
| Zaro, Elise Sorge |
| Zhou, Yifan |