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: 

Abdallah, Ayman
Abdolvand, Neda
Abebe, Gumataw
Aboah, Joshua
Aboelazm, Karem
Abushaikha, Ismail
Acquah, Innocent Senyo Kwasi
Adams, Frank
Adhikari , Arnab
Ageron, Blandine
Agrawal, Rajat
Agyabeng-Mensah, Yaw
Ahmed, Waqar
Aitken, Alan
Aitken, James
Akhavan, Roya
Akman, Gülşen
Aktas, Emel
Akyuz, Goknur
Alaeddini, Mahdi
Alam, Arshad
Alawamleh, Mohammad
Alcântara, Rosane
Ali, Abubakar
Ali, Abubakar 
Ali, Imran
Alkalha, Ziad
Alkhudary, Rami
Altay, Nezih
Altuntas Vural, Ceren
Aminoff, Anna
Anastasiadis, Foivos
Ancarani, Alessandro
Annala Tesfaye, Linda
Anthony Jnr., Bokolo
Arantes, Amílcar
Argyropoulou, Maria
Arhin, Ishmael
Arun, Korhan
Arvidsson, Ala
Asamoah, David
Astuti, Retno
Ata, Asad
Atkins, Ryan
Awan, Usama
Awe, Olajumoke
Azar, Adel
Azmi Murad, Masrah Azrifah
Bahri, Nedra
Bailey, Adrian
Bailey, Jennifer
Balan, Carmen
Balouei Jamkhaneh, Hadi
Bamford, David
Barbieri, Paolo
Barnes, David
Barnett, John 
Baxter, John
Beecher, Paul
Beh, Loo-See
Behl, Abhishek
Beltagui, Ahmad
Ben-Jebara, Marouen
Benitez, Guilherme
Benitez, Guilherme
Berg, Terje
Bhandal, Rajinder
Bharathi S, Vijayakumar
Bhattacharya, Ananya
Bhupendra, Kumar
Bijman, Jos
Birkel, Hendrik
Birou, Laura
Blessley, Misty
Boccaletti, Stefano
Boehme, Tillmann
Boffelli, Albachiara 
Bojar, Waldemar
Boon-Itt, Sakun
Bourlakis, Michael
Brady, Malcolm
Brandenburg, Marcus
Breen, Liz
Breite, Rainer
Broens, Michael
Brown, Anthony
Bryde, David
Buijs, Paul
Bustinza, Oscar F.
Butt, Atif Saleem
Byrne, PJ
Cakmak, Emre
Calatayud, Agustina 
Calleja, Gema 
Calvo, Erick
Cammarano, Antonello
Carnovale, Steven
Cerchione, Roberto
Cezarino, Luciana
Chai, Sangmi
Chakraborty, Subhajit
Chang, Donald
Chang, She-I
Chang, Wei-Shiun
Chatha, Kamran
Chatterjee, Samir
Chaudhry, Sohail
Chaudhuri, Atanu
Chauhan, Chetna
Chebolu-Subramanian, Vijaya
Chen, Jie
Chen, Jinliang
Chen, Kuan-Yang
Chen, Mu-Chung
Chen, Zhisong
Cheng, Jao-Hong
Cheng, Yang
Chiarini, Andrea
Childerhouse, Paul
Chou, Jerome
Chou, Yan-Yu
Chung-Yean , Chiang
Ciarapica, Filippo Emanuele
Ciasullo, Maria Vincenza
Cislaghi, Tatiane
Clauberg, Rolf
Colicchia, Claudia
Confente, Ilenia
Cordon, Carlos
Costa, Flávio
Cozzolino, Alessandra
Creazza, Alessandro
Cruz, Jesús
Cucchiella, Federica
D'adamo, Idiano
Dabic, Marina
Dai, Jing
Dalenogare, Lucas
Dani, Samir
De Leeuw, Sander
De Vries, Henk
Dehe, Benjamin
Dekkers, Rob
Delalić, Sead
Delic, Mia
Di Benedetto, Anthony
Didonet, Simone
Doan, Tam
Drake, Paul
Dreyer, Heidi Carin
Dubey, Rameshwar
Dunay, Anna
Duong, Linh
Elg, Mattias
Ellegaard, Chris
Erdogan, Hande
Erikshammar, Jarkko
Esain, Ann
Eslami, Mohammad H.
Eyers, Daniel
Eyers, Daniel 
Falagara Sigala, Ioanna
Fatorachian, Hajar
Fawcett, Stanley
Fayezi, Sajad
Feng, Taiwen
Ferreira, Luis
Fischer, Christian 
Fischl, Maria
Formentini, Marco
Francisco, Antonio
Francisco, Kristoffer
Frank, Alejandro
Frazzon, Enzo
Freeman, James
Galati, Francesco
Galindo, Gina
Ganga, Gilberto
Ganzaroli, Andrea
Gaoxiang, Lou
Garcia-Torres, Sofia
Garcia-Villarreal, Enrique 
Garg, Rajiv
Garvey, Myles 
Gaudenzi, Barbara
Gebresenbet, Girma
Ghaderi, Hadi
Gold, Stefan
Golgeci, Ismail
Gómez Luciano, Cristino Alberto
Gonul Kochan, Cigdem
González-Díaz, Manuel
Gonzalez-Feliu, Jesus
Gooch, Martin 
Gouda, Sirish
Green, Kenneth
Gruner, Richard
Guarnieri, Patricia
Guimaraes, Renato 
Gupta, Manjul
Gurcaylilar-Yenidogan, Tugba
Gurgen, Ender 
Gyarmathy, Andrea
Haleem, Abid
Halldorsson, Arni
Hallikas, Jukka
Hamdani, Fatima Ezzahra
Hartley, Janet
Hartmann, Julia
Hazell, Julie
Herburger, Michael
Hine, Damian
Hinkka, Ville
Holmen, Elsebeth
Holschbach, Elmar
Hou, Fujun
Hou, Jiachen
Huang, Yuan
Huo, Baofeng
Huq, Fahian
Ilgaz Sumer, Selay
Inman, Robert
Jääskeläinen, Aki
Jabbour, Charbal
Jafarian, Ahmad
Jain, Nikunj
Jajja, Muhammad Shakeel Sadiq
Janjic, Aleksandar
Janné, Mats
Jena, N
Jenkinson, Damian
Jin, Yao
Johnsen, Thomas
Johny, Jestin
Joo, Seong-Jong
Jum'a, Luay
Kähkönen, Anni-Kaisa
Kalaitzi, Dimitra
Kalantari, Taher
Kalchschmidt, Matteo Giacomo Maria
Kalra, Jas
Kam, Booi
Kapletia, Dharm
Karatzas, Antonios
Karttunen, Elina 
Kauppi, Katri
Kaynak, Hale
Kinra, Aseem
Kleemann, Florian
Kumar, Niraj
Kumar, Patanjal
Kwok, Andrei O. J.
Laari, Sini
Lalwani, Chander 
Lambrechts, Frank
Lange, Anne
Lavastre, Olivier
Lehtonen, Juha-Matti
Lestari, Fitra
Lewis, Michael
Li, Qinyun
Li, Xiang
Li, Xun
Li, Yi
Lichtner, Valentina
Lillrank, Paul
Lin, Yong
Lin, Yuwei
Lintukangas, Katrina
Lorentz, Harri
Luzzini, Davide
Macchion, Laura
Maghsoudi, Amin
Magnan, Gregory
Magutu, Peterson
Mahfouz, Amr
Mahroof, Kamran
Marques, Leonardo
Martìnez-Jurado, Pedro
Mccormack, Kevin
Mcdougall, Natalie
Melander, Lisa
Meriton, Royston
Michaelides, Zenon
Michalski, Marek
Minunno, Roberto 
Moghadasian, Mahdi
Mohammad Shafiee, Majid
Monfared, Radmehr 
Monios, Jason
Montabon , Frank 
Montoya-Torres, Jairo R.
Morais, Dafne
Mosavi, Seyed Habibollah
Mosher, Gretchen
Motwani, Jaideep
Moura, Delmo
Moyano-Fuentes, José
Mueller, Elisabeth
Naim, Mohamed
Nakandala, Dilupa
Nasiri, Mina
Neupane, Ganesh
New, Steve
Nidibuuza, Dinah
Nikookar, Ethan
Nilsson, Fredrik
O’higgins, Ciara
Paiva, Ely
Palit, Niladri 
Pålsson, Henrik
Patrucco, Andrea 
Paulsson, Ulf
Pereira, Susana
Philips, Christina
Pimenta, Marcio
Plasch, Michael
Powell, Haydn
Prakash, Gyan
Qamar, Amir
Qi, Yinan
Quansah, Ewuradjoa
Queiroz, Maciel
Ramanathan, Usha
Rego, Nazaré
Reid, Iain
Revoredo-Giha, Cesar
Riley, Jason
Ringsberg, Henrik 
Roden, Sinéad
Rodríguez Bolívar, Manuel Pedro
Roehrich, Jens
Rogers, Helen
Roy, Priyanka
Roy, Vivek
Royer, Annie
Rubio, Sergio
Saeed, Amer
Sagawa, Juliana
Samaranayake, Premaratne
Santén, Vendela 
Santos, Joaquim 
Schoechtel, Andreas 
Seuring, Stefan
Seyedghorban, Zahra
Shi, Guang
Shi, Yangyan
Simpson , Dayna
Singh , Vishal 
Smith, Frida
Soares, Anabela
Sohal, Amrik
Soosay, Claudine
Srivastava, Mohit
Stevenson, Mark
Tharnejad, Hossein
Torabi, S. Ali
Touboulic, Anne 
V. Vlajic, Jelena
Van Der Merwe, Melissa
Van Der Werff , Lisa
Van Hoek, Remko
Varsei, Mohsen
Vieira, Luciana
Vilalta-Perdomo, Eliseo
Vlachos, Ilias
Wang, Jason.X
Wee, Hui Ming
Wegner, Douglas
Wieland, Andreas
Wilding, Richard
Williams, Sharon
Wong, Chee Yew
Yalina, Nita
Yu, Kangkang
Zhuang, Zheng-Yun
Zimmermann, Ricardo
Zondag, Marcel
Zsidisin, George
Zubairu, Nasiru