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:
| Abate, Guido |
| Abdelfattah, Tarek |
| Abdullah Salim, Abdullah Sallehhuddin |
| Abela, Mario |
| Abeysekera, Indra |
| Abhayawansa, Subhash |
| Aboelazm, Karem |
| Abou Taleb , Mona |
| Aboud, Ahmed |
| Abu Bakar, Norhidayah |
| AbuRaya, Rania |
| Adams, Carol |
| Adrain, Anne |
| Agrawal, Nishant |
| Agyemang, Gloria |
| Ahmed Haji, Abdifatah |
| Ahrens, Thomas |
| Al-Shaer, Habiba |
| Alewine, Hank |
| Alhamood, Abdullah |
| Ali, Shahid |
| Aliyu, Sulaiman |
| Almofleh, Mohamed |
| Alola, Andrew |
| Alsaadi, Abdullah |
| Alsaid, Loai |
| Alves, Maria do Céu |
| Anagnostopoulou, Seraina |
| Andrades, Javier |
| Anholon, Rosley |
| Antheaume, Nicolas |
| Antonini, Carla |
| Aranda Uson, Jose Alfonso |
| Arayssi, Mahmoud |
| Ardiana, Putu |
| Argiles-Bosch, Josep María |
| Arroyo, Paulina |
| Arunachalam, Murugesh |
| Ashraf, Naeem |
| Awan, Usama |
| Aydın, Kenan |
| Aysan, Ahmet |
| Baboukardos, Diogenis |
| Bahari, Asniati |
| Barrett, Mereana |
| Barter, Nick |
| Bartolacci, Francesca |
| Becker, Albrecht |
| Bednárová, Michaela |
| Belal, Ataur |
| Ben Ismail, Nesrine |
| Benkert, Julia |
| Berland, Nicolas |
| Biehl, Christoph |
| Bozumuremyi, Sylvestre |
| Borges, Alvim |
| Bose, Sudipta |
| Botchway, Gloria |
| Botes, Vida |
| Boulianne, Emilio |
| Bouten, Lies |
| Bradley, Oliver |
| Breitbarth, Tim |
| Brennan, Niamh M. |
| Brieger, Steven A. |
| Buck, Bastian |
| Buertey, Samuel |
| Busulwa, Richard |
| Cabrera-Narváez, Andrés |
| Cahaya, Fitra Roman |
| Calace, Donato |
| Calic, Goran |
| Camilleri, Mark |
| Cantele, Silvia |
| Caputo, Fabio |
| Caron, Marie-Andrée |
| Carter, Amanda |
| Casanueva, Cristobal |
| Chantziaras, Antonios |
| Charnock, Robert |
| Chen, Honghui |
| Chen, Hongtao |
| Chen, Huangyue |
| Chen, Yunsen |
| Chiah, Mardy |
| Christiansen, Lærke |
| Clarkson, Peter |
| Cohen, Sandra |
| Conradie, Pieter |
| Cook, Kirsten |
| Corazza, Laura |
| Correa García, Jaime Andrés |
| Costa, Ericka |
| Cottafava, Dario |
| Coulson, Andrea |
| Crvelin, David |
| Cuckston, Thomas |
| Cuel, Roberta |
| Cuganesan, Suresh |
| Cushen, Jean |
| De los Rios, Araceli |
| De Villiers, Charl |
| Dedoulis , Emmanouil |
| Del Brio Gonzalez, Jesus Angel |
| Denedo, Mercy |
| Dey, Colin |
| Di Vaio, Assunta |
| Dimitropoulos, Panagiotis |
| Ditillo, Angelo |
| Donkor, Augustine |
| Doucouliagos, Hristos |
| Doukakis, Leonidas |
| Duarte, Ana Patricia |
| Dumay, John |
| Dwekat, Aladdin |
| Eckersley, Peter |
| Egan, Matthew |
| Ejiogu, Amanze |
| Elamer, Ahmed |
| Elamer, Ahmed |
| Esteban Salvador, María Luisa |
| Faisal, Faisal |
| Farfan-Lievano, Angelica |
| Farooq, Muhammad |
| Fassas, Athanasios |
| Favotto, Alvise |
| Ferguson, John |
| Fernandez-Feijoo, Belen |
| Ferry, Laurence |
| Fiandrino, Simona |
| Figge, Frank |
| Finau, Glenn |
| Fragoso, Rui |
| Freedman, Marty |
| Frost, Geoff |
| Gaia, Silvia |
| Gamble, Edward |
| García Sánchez, Isabel María |
| García-Meca, Emma |
| García-Piña Rosete, Juan Carlos |
| Garcia-Torea, Nicolas |
| Gazzola, Patrizia |
| Ghio, Alessandro |
| GIner, Begoña |
| Giordano-Spring, Sophie |
| Gómez-Villegas, Mauricio |
| Grambovas , Christos |
| Granà, Fabrizio |
| Gray, Susan |
| Griffin, Paul |
| Grose, Christos |
| Grosvold, Johanne |
| Grougiou, Vassiliki |
| Gunarathne, Nuwan |
| Harjoto, Maretno |
| Hassan, Abeer |
| Hazelton, James |
| He, Guanming |
| He, Xinwu |
| Herbohn, Kathleen |
| Hewage, Kesara |
| Hewawithana, Dushy |
| Hewege, Chandana |
| Hoepner, Andreas |
| Holland, John |
| Hoozée, Sophie |
| Hourneaux Junior, Flavio |
| Hsiao, Pei-Chi |
| Hsu, Gary |
| Hu, Jun |
| Hussain, Muhammad Jameel |
| Iatridis, George |
| Ibrahim, Masud |
| Ifada, Luluk |
| Ike, Masayoshi |
| Imbrogiano, Jean-Pierre |
| Jain, Ameeta |
| Jarosz Wukich, Jacqueline |
| Johnsen, Thomas |
| Joseph, George |
| Kaile, Zhou |
| Kamran, Muhammad Kamran |
| Kaur, Amanpreet |
| Kazemikhasragh, Amirreza |
| Keddie, S. Leanne |
| Kend, Michael |
| Khan, Habib |
| Kim, Hohyun |
| Kinderman, Daniel |
| Korca, Blerita |
| Kork, Anna |
| Kosmidou, Kyriaki |
| Kourtidis, Dimitris |
| Krasodomska, Joanna |
| Kurpierz, John |
| Kurrohman, Taufik |
| Kuruppu, Chamara |
| La Torre, Matteo |
| Laine, Matias |
| Larrán, Manuel |
| Larrinaga, Carlos |
| Lauwo, Sarah |
| Le Roux, Catherine |
| Lee, W. Eric |
| Leseure, Michel |
| Leung, Tiffany |
| Leventis, Stergios |
| Li, Qian |
| Li, sihai |
| Liao, Lin |
| Lim, Alwyn |
| Lim, Marc |
| Lin, Li |
| Liu, Tiansen |
| Liu, Yang Stephanie |
| Lodh, Suman |
| Lodhia, Sumit |
| Lokman, Norziana |
| Long, Wenbin |
| López-Arceiz, Francisco |
| Louhichi, Wael |
| Loza Adaui, Cristian |
| Luque-Vílchez, Mercedes |
| M.P, SaJan |
| Magnan, Michel |
| Mahadeo, Jyoti Devi (Brinda) |
| Maher, Jeriji |
| Majoch, Arleta |
| Mäkelä, Hannele |
| Malsch, Bertrand |
| Manzhynski, Siarhei |
| Maran, Laura |
| Marín-Vinuesa, Luz María |
| Maroun, Warren |
| Martinho, Carla |
| Martinopoulos, Georgios |
| Mateo-Márquez, Antonio J. |
| Matuszak, Łukasz |
| Maurice, Jonathan |
| McCullough, Brian |
| McDonald-Kerr, Lachlan |
| McLaren, Josie |
| McNicholas, Patty |
| Meng, Xiaohua |
| Mertzanis, Charilaos |
| Mesa-Pérez, Enrique |
| Meyer, Camille |
| Michelon, Giovanna |
| Milne, Markus |
| Miralles-Quiros, Jose Luis |
| Miralles-Quiros, Maria Mar |
| Mirihagalla, Padmaka |
| Mohammed, Sani |
| Monjarret, Claire |
| Mooneeapen, Oren |
| Morrell, Kevin |
| Morrison, Leanne |
| Moses, Olayinka |
| Murthy, Vijaya |
| Naciti, Valeria |
| Nakajima, Michiyasu |
| Nakpodia, Franklin |
| Nandy, Monomita |
| Ndamba, Rodney |
| Negre, Emmanuelle |
| Ng, Artie |
| Ngoc Ho, Minh |
| Nguyen, Mai |
| Nicholls, Jeremy |
| Nieberle, Karolina |
| Nishitani, Kimitaka |
| Nodehi, Mehrab |
| Noronha, Carlos |
| Nour, Prof,Dr,Abdulnaser |
| Ntim, Collins |
| Nulkar, Gurudas |
| Nyame-Asiamah, Frank |
| O'Donohoe, Sheila |
| Orazalin, Nurlan |
| Ortas Fredes, Eduardo |
| Oshika, Tomoki |
| Palumbo, Rocco |
| Pamminger, Francis |
| Papoutsi, Aikaterini |
| Parrondo, Luz |
| Patten, Dennis |
| Pavan Serafim, Milena |
| Pedron, Angela Patricia |
| Pencle, Nadra |
| Perera, Chamila |
| Pesci, Caterina |
| Peylo, Benjamin Tobias |
| Pianezzi, Daniela |
| Picot, Russell |
| Pizzi, Simone |
| Potter, Bradley |
| Qasem, Ameen |
| Raar, Jean |
| Ragazzi, Marco |
| Raimo, Nicola |
| Rajagopal, Rajesh |
| Rauter, Romana |
| Rehman, Shafique |
| Reimsbach, Daniel |
| Reuter, Marek |
| Rexhepi, Gadaf |
| Rezaee, Zabihollah |
| Rimmel, Gunnar |
| Rinaldi, Leonardo |
| Robey, Dawn |
| Rodrigues Boente, Diego |
| Rounaghi, Mohammad Mahdi |
| Rowbottom, N |
| Russell, Shona |
| Saadaoui, Khaled |
| Saeudy, Mohamed |
| Saha, Anup |
| Sales De Aguiar, Thereza |
| Sarea, Adel |
| Scarpellini, Sabina |
| Schadewitz, Hannu |
| Schaefer, Jones |
| Schaltegger, Stefan |
| Schiehll, Eduardo |
| Schiemann, Frank |
| Schneider, Fabiola |
| Schneider, Thomas E |
| Scrimgeour, Frank |
| Secinaro, Silvana |
| Senaratne, Samanthi |
| Senkl, Daniela |
| Serrano-Cinca, Carlos |
| Shaukat, Amama |
| She, Chaoyuan |
| Sheenan, Lisa |
| Shen, Hongtao |
| Siddiqui, Javed |
| Simoni, Lorenzo |
| Siriwardhane, Pavithra |
| Skouloudis, Antonios |
| Solórzano-García, Marta |
| Song, Hakjoon |
| Soobaroyen, Teerooven |
| Sorola, Matthew |
| Soverchia, Michela |
| Stankowska, Anna |
| Stecyk, Karolina |
| Steyn, Maxi |
| Subramaniam, Nava |
| Taïbi, Souad |
| Tajaddini, Reza |
| Tampakoudis, Ioannis |
| Tauringana, Venancio |
| Tello Melendez, Edward |
| Thankom, Arun |
| Thomson, Ian |
| Tian, Jie |
| Tietmeyer, Raphael |
| Tilt, Carol |
| Tingey-Holyoak, Joanne |
| Tirado-Valencia, Pilar |
| Tiron-Tudor, Adriana |
| Topple, Cheree |
| Tortosa-Ausina, Emili |
| Triki Damak, Sana |
| Tsamenyi, Mathew |
| Tsileponis, Nikos |
| Tweedie, Dale |
| Tyson, Tom |
| Utama, Anak Agung Gde Satia |
| Uyar, Ali |
| Venturelli, Andrea |
| Viere, Tobias |
| Vigneau, Laurence |
| Vimalnath, Pratheeba |
| Vinnari, Eija |
| Vithana, Krishanthi |
| Vlismas, Orestes |
| Vogel-Pöschl, Heike Christiane |
| Wallace, Dana |
| Walz, Matthias |
| Wang, Kuang-Hua |
| Wang, Le |
| Wang, Xuejun |
| Wang, Yi |
| Wasantha Pathiranage, Nandana |
| Wijesinghe, Nayomi |
| Worae, Thomas |
| Wu, Qi |
| Xiao, Hong |
| Yang, Jessica |
| Yıldırım, Durmuş Çağrı |
| Yıldırım, Seda |
| Young-Ferris, Anna |
| Young, Steven |
| Young, Suzanne |
| Zahid, Muhammad |
| Zaman, Rashid |
| Zeisel, Stefan |
| Zhang, Linhan |
| Zhang, Yan |
| Zhang, Ziyang |
| Zhou, Xioayan |
| Zhu, Bing |
| Zicari, Adrian |
| Zyznarska-Dworczak, Beata |