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:

• Abdeen, Nisreen
• Abdessemed, Amina
• Adams, Betina
• Aituganova, Nargiz
• Akçabozan Taşkıran, Aylin
• Al Shehab, Oruba
• Al-Taher, Hanadi
• Alatalu, Riin
• Alcindor, Monica
• Amatulli, Cesare
• Angel, Victoria
• Arbab, Parsa
• Armitage, Lynne
• Arya, Meghal
• Asuoha, Godson
• Barazzetti, Luigi
• Baró Zarzo, José Luis
• Benedjma, Iqbal
• Benkari, Naima
• Bin Hasbollah, Hasif
• Binti Md Jani, Haza Hanurhaza
• Borg, Malcolm
• Boukas, Nikolaos
• Boussaa, Djamel
• Brotosusilo, Agus
• Brown, Steve
• Bucking, Scott
• Buckley, Kristal
• Cantimur, Burcu Buken
• Capestro, Mauro
• Carvache-Franco, Wilmer
• Casanovas, Xavier
• Cervelló-Royo, Roberto
• Ch'ng, Eugene
• Chapman, William
• Chauhan, Ekta
• Checa, Francisco
• Chen, Arthur
• Choo, Ling Suan
• Chun, Yuna
• Clack, Timothy
• Cobbing, Andrew
• Codinhoto, Ricardo
• Coïsson, Eva
• Colavitti, Anna Maria
• Corapciioglu, Gulferah
• Correia, Mariana
• De Dato, Pasquale
• Desai, Jigna
• Dettwiler, Paul
• Dhou, Khaldoon
• Díaz, José
• Dimitrijevic, Branka
• Doğan, Mustafa
• Dolatabadi, Fariborz
• Du Cros, Dr Hilary
• Efremovski, Martin
• Ekberg, Adam
• Elhabashi, Alaa
• Emerick, Keith
• Engelhardt, Richard
• Erkan, Yonca
• Escalante, Eduardo
• Eshrati, Parastoo
• Esmer, Mine
• Falcão, Ana Paula
• Falebita, Oluwabunmi
• Fanni, Zohreh
• Ferreira, Teresa
• Feyzulayev, Alim
• Folkers, Antoni
• Forero, Juliana
• Garijo Alonso, Lucía
• Gasparini, Giada
• Georgopoulos, Andreas
• Gerster, Julia
• Giduturi, Viswanadh
• Gil Piqueras, María Teresa
• Giorgino, Maria Cleofe
• Giovene Di Girasole, Eleonora
• Goffi, Federica
• Gould, Peter
• Graham, Katie
• Grazuleviciute-Vileniske, Indre
• Green, Patricia
• Grima, Rueben
• Gudro, Ilze
• Guerrero Baca, Luis Fernando
• Guessoum, Riyadh Nour
• Gutland, Michael
• Hadzimuhamedovic, Amra
• Hajahjah, Zain
• Haron, Jehad
• Hasaltun Wosinski, Miray
• Hegde, Gayathri
• Heras, Veronica
• Herbig, Ulrike
• Hidaka, Lucia Tone
• Huang, Shu-Mei
• Iborra Bernad, Federico
• Inocian, Reynaldo
• Insoll, Timothy
• Isiani, Mathias Chukwudi
• Ismahasan, Biung
• Jain, Shikha
• Jalilisadrabad, Samaneh
• Janse, Helga
• Jerliu, Florina
• Kalakoski, Iida
• Kallas, Joe
• Kelley, Stephen
• Khodeir, Laila Mohamed
• Kokkranikal, Jithendran J.
• La Spina, Vincenzina
• Lang, Wei
• Lawal Dano, Umar
• Lindqvist, Katja
• Little, Terry
• Lixinski, Lucas
• Lopez-Guzman, Tomas
• Lourenço, Paulo
• M Zancheti, Silvio
• Macchioni, Elena
• Maclaren, Fergus
• Magni, Domitilla
• Mahdy, Hossam
• Mariotti, Alessia
• Marmolejo-Martín, Juan Antonio Marmolejo Martín
• Marrion, Christopher
• Martínez Yáñez, Celia
• Mccarthy, Tina
• Mcguire, Christine
• Mehdizadeh, Fatemeh
• Memarian, Gholamhosein
• Mihanovic, Andelko
• Minguzzi, Magda
• Moazen, Sajad
• Mohamad, Zam Zuriyati
• Moradi, Asghar Mohammad
• Moscoso-Cordero, María
• Mrak, Iva
• Muñoz-Fernández, Guzmán A.
• Munro, Dane
• Nakano, Ryoko
• Napolitano, Rebecca
• Nasiri, Negar
• Norouzian-Maleki, Saeid
• Nwashindu, Vitalis
• Ogawa, Akihiro
• Okonkwo, Uche
• Omar, Hamimi
• Onyemechalu, Stanley
• Opata, Christian
• Orden-Mejía, Miguel
• Orgaz Agüera, Francisco
• Ost, Christian
• Özcan, Koray
• Panda, Sudha
• Pardo Redondo, Gabriel
• Peluso, Alessandro Maria
• Pereira, Mariana
• Pérez Gonzalez, Cesáreo
• Petruccioli, Attilio
• Pierdicca, Roberto
• Piotrowska, Katarzyna
• Poshyanandana, Saowalux
• Potdar, Komal
• Pulatsu, B. P.
• Quagliuolo, Maurizio
• Reeves, Keir
• Refaat, Marwa
• Rehailia, Hassib
• Rivera-Collazo, Isabel C.
• Robinson, Laura
• Rodas Espinoza, Paula
• Rodríguez Navarro, Pablo
• Rojas, Eduardo
• Ross, Susan
• Ruiz Gutiérrez, Ana
• Sabery, Mahdieh
• Saeed, Mohamed Ahmed
• Safdar, Sohail
• Şahin Güçhan, Neriman
• Said, Shahrul
• Saleem, Muhammad
• Sammartano, Giulia
• Sanaa, Niar
• Santolin, Alberto
• Sapian, Abdul Razak
• Sardella, Alessandro
• Sayed Hassan Sharaf Eldin, Shahira
• Schadla-Hall, Tim
• Schimek, Michael
• Schlee, Monica
• Settembre Blundo, Davide
• Shaaban, Mahmoud
• Shim, Hyeseung
• Shyju, P. J.
• Siguencia Avila, Maria
• Silberman, Neil
• Smith, Claire
• Smith, Laurie
• Sodangi, Mahmoud
• Sohoni, Pushkar
• Soler-Estrela, Alba
• Solomon, Priya
• Sorroche Cuerva, Miguel Ángel
• Soumia, Bouzaher
• Spanò, Antonia
• Steenberghen, Thérèse
• Sudikno, Antariksa
• Swensen, Grete
• Tagoe, Naa Dedei
• Taylor, Ken
• Teba, Tarek
• Tupenaite, Laura
• Uchiyama, Christienne
• Vallis, Stacy
• Van Damme, Kay
• Varma, Anurag
• Vashisht, Ajay
• Vatan, Meltem
• Vegas López-Manzanares, Fernando
• Veiga, Rosário
• Velandia Silva, Cesar Augusto
• Verma, Saurabh
• Villagómez-Buele, Cesar
• Wang, Cangbai
• Wang, Shuli
• Wang, Shuyi
• Weise, Kai
• Wells, Jeremy
• Wilson, Chris
• Winter, Tim
• Yabacı, Azize Elif
• Yan, Haiming
• Yang, Chen
• Yarza Pérez, Ana Jayone
• Yehia, Maye
• Yen, Alex
• Zand Dizari, Nasim