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:

• Abeysekara, Nalin
• Agárdi, Irma
• Agarwal, Ruchi
• Ahmad, Hassan
• Aithal, Rajesh K.
• Alam, Mirza Mohammad Didarul
• Alam, Syed Hasnain
• Alexander, Marina
• Ali, Amjad
• Aman, Asad
• Amjad, J.
• Amsl, Sarah
• Andrejic, Milan
• Anninou, Ioanna
• Anshu, Kumari
• Antony, Rose
• Arora, Sourabh
• Artusi, Federico
• Arya, Vikas
• Aslam, Usman
• Assimakopoulos, Costas
• Atik, Marwan
• Aw, Eugene
• Aydin, Hatice
• Bagdare, Shilpa
• Bailey, Ainsworth Anthony
• Ballantine, Paul
• Balqiah, Tengku Ezni 
• Barbosa, Belem
• Basu, Rituparna
• Beacom, Emma
• Beeck, Ines
• Behe, Bridget
• Bezes, Christophe
• Bhardwaj, Preshth
• Bhatt, Gaurav
• Bhattacharya, Sujoy
• Bickle, Marianne
• Bigne, Enrique
• Bilińska-Reformat, Katarzyna
• Blair, James
• Blumenstein, Edda
• Boardman, Rosy
• Börühan, Gülmüş
• Boulay, Jacques
• Bourlakis, Michael
• Boutsouki, Christina
• Brun, Alessandro
• Brusset, Xavier
• Byun, Sang-Eun
• Caboni, Federica
• Cao, Lanlan
• Cerha, Cordula
• Cha, Seong-Soo
• Chakrabarti, Somnath
• Chakraborty, Swagata
• Chandra, Saurabh
• Chang, Byeong-Yun
• Chang, Hyo Jung
• Channa, Nisar Ahmed
• Chaouali, Walid
• Charles, Jebarajakirthy
• Charoennan, Wanwisa
• Chatterjee, Patrali
• Chaturvedi, Pallavi
• Chatzipanagiotou, Kalliopi
• Chen, Jing
• Chen, Ruofei
• Chen, Xudong
• Chen, Yanyan
• Childs, Michelle
• Chung, Te-Lin
• Clarke, Graham
• Clayton, Helen
• Cliquet, Gérard
• Coelho Do Vale, Rita
• Collin Lachaud, Isabelle
• Cullen, John
• Cunningham, Nicole
• Curto, José Dias
• Da Costa Webber, Cleber
• Darwish, Tamer
• Das, Manish
• Dawson, David
• De Canio, Francesca
• De Cicco, Roberta
• De Gauquier, Laurens
• De Leeuw, Sander
• De Silva Kanakaratne, Maheshan
• Deli-Gray, Zsuzsa
• Delistavrou, Antonia
• Demoulin, Nathalie
• Dewani, Prem Prakash
• Diallo, Mbaye Fall
• Dias, Joana
• Duarte, Paulo
• Eklund, Andreas 
• Ellis-Chadwick, Fiona
• Elmashhara, Maher Georges
• Elms, Jonathan
• Eriksson, Ebba
• Escadas, Marco
• Esfidani, Mohammad Rahim
• Evans, Joel
• Farquhar, Jillian
• Fayos, Teresa
• Flavian, Carlos
• Florence, Charton-Vachet
• Fotiadis, Thomas
• Frasquet, Marta
• Fuentes-Blasco, Maria
• Gallarza, Martina G.
• Garnier, Isabelle
• Giakoumaki, Christina
• Gil, Maria
• Giovanis, Apoostolos
• Goh, Yen-Nee
• Gómez-Borja, Miguel-Ángel
• González, Eva M.
• Gorji, Mohammadbagher
• Graciola, Ana Paula
• Grandi, Benedetta
• Grappe, Cindy
• Gularte, Aline
• Gunness, Aneeshta
• Haas, Yvonne
• Halan, Deepak
• Halbheer, Daniel
• Hamouda, Manel
• Hatzithomas, Leonidas
• Hemar-Nicolas, Valérie
• Henkel, Laura
• Henninger, Claudia
• Hickman, Ellie
• Hoang, Linh Vu
• Hoang, Dong
• Hofer, Katharina Maria
• Holweg, Christina
• Holzapfel, Andreas
• Hossain, Md Shamim
• Hübner, Alexander
• Hyun, Hyowon
• Ieva, Marco
• Jafari, Hamid
• Jayasankaraprasad, Cherukuri
• Jeong, Haeyoung
• Johansson, Ulf
• Johnson, Olivia
• Jones, Peter
• Jones, Robert
• Kalafatis, Stavros
• Kang, Ji Hye
• Kanji, Priyadharshini
• Karantinou, Kalipso
• Kasilingam, Dharun Lingam
• Kaswengi, Joseph
• Kautish, Pradeep
• Kazancoglu, Ipek
• Khare, Arpita
• Khurana, Kavita
• Ki, Chung-Wha (Chloe)
• Kim-Vick, Jihyun
• Kim, Do Yuon
• Kim, Naeun
• Kim, Seeun
• Kim, Youn-Kyung
• Kinra, Aseem
• Koay, Kian Yeik
• Koo, Wanmo
• Kotzab, Herbert
• Kuhn, Heinrich
• Kumar Mangla, Sachin
• Kumar, Harish
• Kwon, Ohbyung
• Labban, Alice
• Lambey, Christine
• Lao, Aurély
• Lee, Jong Geun
• Lee, Stacy H. N.
• Lee, Yuri
• Lermen, Fernando Henrique
• Liang, Yan
• Liang, Yuli
• Litalien, Ben
• Liu, Haoyu
• Lombart, Cindy
• Louis, Didier
• Loureiro, Sandra
• Luan, Chi-Cheng
• Lucia-Palacios, Laura
• Luoma, Jukka
• Luttermann, Sandra
• Lyford, Conrad
• Magalhães, Mauricio
• Mahapatra, Sabita
• Mainardes, Emerson
• Martinelli, Elisa
• Matsui, Kenji
• Matyusz, Zsolt
• Mavragani, Eleni
• Mehta, Ritu
• Milioti, Christina
• Miquel-Romero, Maria-Jose
• Mishra, Ruchi
• Mishra, Sita
• Modi, Ashwin
• Mohamadi, Navid
• Mohammad Shafiee, Majid
• Mohd-Ramly, Suhaily
• Molinillo, Sebastian
• Morales, Luis Emilio
• Moretta Tartaglione, Andrea
• Moulins, Jean-Louis
• Mrutzek-Hartmann, Bastian
• Mukerjee, Kaushik
• Naeem, Muhammad
• Nandonde, Felix
• Nguyen-Le, Xuan-Doanh
• Norrman, Andreas
• O’Reilly, Kelley
• Onal, Sevilay
• Oueslati, Hanene
• Pallant, Jason
• Pantano, Eleonora
• Parida, Rashmi Ranjan
• Park, Joohyung
• Patel, Shivan
• Patsiotis, Athanasios
• Perannagari, Krishna
• Potdar, Balkrushna
• Priporas, Constantinos
• Rauschnabel., Phillip
• Ray, Arghya
• Rehncrona, Carin
• Renzi, Maria Francesca
• Ribeiro Cardoso, Paulo
• Rintamaki, Timo
• Rodrigues, Clarinda
• Roll, Oliver
• Rosenbaum, Mark
• Roy, Subhadip
• Rudkowski, Janice
• Ruiz-Molina, Maria-Eugenia
• Sadachar, Amrut
• Sahi, Gurjeet
• Sakrabani, Poorni
• Sales-Vivó, Vicente
• Salhieh, Loay
• Sallnäs, Uni
• Săplăcan, Zsuzsa
• Sarkar, Abhigyan
• Schröder, Hendrik
• Schwendtner, Teresa
• Seock, Yookyoung
• Sharma, Narendra
• Sharma, Neha
• Shi, Si
• Siami, Sahar
• Silva, Susana
• Singh, Reema
• Siregar, Yuri
• Sit, Kokho
• Sloot, Laurens
• Soares, Ana Maria
• Sorkun, Metehan Feridun
• Sperandio Milan, Gabriel
• Spielmann, Nathalie
• Sramova, Blandina
• Srichookiat, Sanit
• Srivastava, Dr Gautam
• Srivastava, Rajesh
• Srivastava, Ritu
• Stoel, Leslie
• Su, Jin
• Sundstrom, Malin
• Teller, Christoph
• Theodoridis, Prokopis
• Thomas, Jane
• Tofighi, Maryam
• Tong, Xiao
• Toporowski, Waldemar
• Triantafillidou, Amalia
• Țugulea, Oana
• Ulkuniemi, Pauliina
• Vannucci, Virginia
• Velayudhan, Sanal
• Venkatesh, V. G.
• Viassone, Milena
• Vieira, Rachel
• Villasenor, Nieves
• Virdi, Preeti
• Vishwakarma, Pankaj
• Vrechopoulos, Adam
• Wang, Shih-Tse
• Wang, Tao
• Wilson, John
• Wood, Steve
• Xu, Mark
• Xue, Liangchao
• Yarimoglu, Emel
• Ye, Fei
• Yildirim, Kemal
• Ylilehto, Marianne
• Yoo, Weonsang
• Yoon, So-Yeon
• Youn, Song-Yi
• Yrjölä, Mika
• Yumurtacı Hüseyinoğlu, Işık Özge
• Yurchisin, Jennifer
• Zafar, Muhammad
• Zaman, Syed Imran
• Zerbini, Cristina
• Zhu, Bing
• Zielke, Stephan
• 张, 李义