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:

• Abraham, Villy
• Abrantes, José
• Abubakari, Aidatu
• Agarwal, James
• Agha Seyed Hosseini, Seyed Reza
• Agnihotri, Arpita
• Agrawal, Amit Kumar
• Aguzzoli, Roberta
• Ahammad, Faisal
• Ahmed, Wasim
• Ahokangas, Petri
• Akdaş, Onur
• Akyuz, Irfan
• Al-Fayad, Fadye
• Alagarsamy, Subburaj
• Alawamleh, Mohammad
• Alexander, Nicholas
• Ali, M. Yunus
• Alteren, Gro
• Altintas, Murat
• Altunisik, Remzi
• Alvandi, Mohsen
• Alvarez, Maria
• Amankwah-Amoah, Joseph
• Amoako, George
• Andersson, Svante
• Andras, Trina
• Andrei, Andreia
• Apaolaza-Ibáñez, Vanessa
• Armenakyan, Anahit
• Arnold, Todd
• Arslan, Ahmad
• Arslanagic-Kalajdzic, Maja
• Ashill, Nicholas
• Ashraf, Abdul Rehman
• Ashraful, Alam
• Aslam, Wajeeha
• Assadinia, Shahin
• Asseraf, Yoel
• Au, Alan
• Aybat, Ozge
• Azar, Goudarz
• Aziz, Mohammed
• Baack, Daniel
• Baig, Aysha
• Bakir, Aysen
• Balabanis, George
• Ballestra, Luca Vincenzo
• Bamel, Umesh
• Banerjee, Snehasish
• Banerjee, Sourindra
• Barbarossa, Camilla
• Basile, Gianpaolo
• Battisti, Enrico
• Baum, Matthias
• Baumann, Chris
• Bayon, Manoj Chandra
• Behl, Abhishek
• Behyan, Mina
• Belyaeva, Zhanna
• Berberyan, Zara
• Bertoldi, Bernardo
• Beverland , Michael
• Bhagat, Parimal
• Bhattacharya, Saurabh
• Biraglia, Alessandro
• Bizumic, Boris
• Bıçakcıoğlu-Peynirci, Nilay
• Blankson, Charles
• Blesa, Andreu
• Boeuf, Benjamin
• Boisvert, Jean
• Bortoluzzi, Guido
• Borzooei, Mahdi
• Boukis, Achilleas
• Bourdin, David
• Brouthers, Keith D.
• Buil, Isabel
• Burger-Helmchen, Thierry
• Burnaz, Huriye Sebnem
• Burt, Steve
• Burton, Suzan
• Bustinza, Oscar F.
• Calandra, Davide
• Campo, Raffaele
• Cappa, Francesco
• Caputo, Francesco
• Cerviño Fernández, Julio
• Chand, Pawan Kumar
• Chatterjee, Sheshadri
• Chaudhuri, Ranjan
• Chen, Chun-Liang
• Chouaibi , Jamel
• Christodoulides, George
• Christofi, Michael
• Chuang, Cheng-Min
• Chun, Rosa
• Cillo, Valentina
• Cleveland, Mark
• Cotta De Mello, Renato
• Crick, Dave
• Cui, Annie
• Dahms, Sven
• Danso, Albert
• Darko, Christian
• Davvetas, Vasileios
• De Angelis, Matteo
• De Vries, Eline
• Dekel-Dachs, Ofer
• Del Vecchio, Pasquale
• Dey, Bidit
• Di Maria, Eleonora
• Di Vaio, Susy
• Diamantopoulos, Adamantios
• Dikova, Desislava
• Dimitrova, Boryana
• Dimofte, Claudiu
• Dinana, Hesham
• Discua Cruz, Allan
• Dominique-Ferreira, Sérgio
• Donbesuur, Francis
• Eastman, Jacqueline
• Efrat, Kalanit
• Ekeledo, Ikechi
• El Nemar, Sam
• Elo, Maria
• Ernst, Holger
• Essuman, Dominic
• Evangelista, Felicitas
• Evers, Natasha
• Fait, Monica
• Faroque, Anisur
• Felix, Reto
• Ferraris, Alberto
• Ferro, Carlos
• Festa, Giuseppe
• Filieri, Raffaele
• Fiore, Mariantonietta
• Fischer, Peter
• Foroudi, Pantea
• Fujita, Momoko
• Gerrath, Maximilian
• Gerschewski, Stephan
• Giacosa, Elisa
• Gotsi, Manto
• Gowda, Shobha B. H.
• Goyal, Vinay
• Gregory, Gary
• Griffith, David A.
• Grippa, Francesca
• Guo, Chiquan
• Haapanen, Lauri
• Hadjielias, Elias
• Hagen, Birgit
• Halkias, Georgios
• Hallikainen, Heli
• Hånell, Sara
• Hang, Haiming
• Hani, Umme
• Hao, Andy
• Hasan, Rajibul
• He, Xinming
• Heinberg, Martin
• Hennart, Jean-Francois
• Hodgkinson, Ian
• Hofer, Katharina Maria
• Holmqvist, Jonas
• Holtbrügge, Dirk
• Hommerová, Dita
• Hou, Fujun
• Hughes, Paul
• Hultman, Magnus
• Iaia, Lea
• Iyer, Rajesh
• Jack, Robert
• Jafari Navimipour, Nima
• Jan Muhammed, Atiya
• Japutra, Arnold
• Jebarajajirthy, Charles
• Jeon, Jung Ok
• Jiao, Yongbing
• Jimenez, Fernando
• Jin, Changhyun
• Johnson, Jessie
• Jones, Carol
• Josiassen, Alexander
• Josiassen, Alexander
• Kalinic, Igor
• Kandi, Niloofar
• Khair, Nadine
• Khalifa, Dina
• Kipnis, Eva
• Kizgin, Hatice
• Kırcova, İbrahim
• Kogut, Clarice
• Kolte, Ashutosh
• Koronios , Konstantinos
• Krüger, Tinka
• Kumar, Satish
• Kurt, Yusuf
• Kury, Beatriz
• Kvasova, Olga
• L'espoir Decosta, Patrick
• Lacan, Camille
• Ladik, Daniel
• Lam, Desmond
• Le, Lang
• Leonidou, Erasmia
• Li, Lee
• Li, Lydia
• Li, Yu
• Liang, Beichen
• Lim, Elison
• Lin, Chih-Pin
• Liu, Martin
• Lodorfos, George
• Lopez, Carmen
• Mafrolla, Elisabetta
• Magnani, Giovanna
• Magni, Domitilla
• Magnusson, Peter
• Maher, Amro
• Mahmoud, Ali
• Mahto, Raj
• Mainolfi, Giada
• Majid, Kashef
• Mandler, Timo
• Manika, Danae
• Maric, Josip
• Martín Martín, Oscar
• Matarazzo, Michela
• Mathews, Shane
• Mavilia, Roberto
• Mengüç, Bülent
• Micevski, Milena
• Michaelidou, Nina
• Mitchell, Sarah-Louise
• Mohiuddin Babu, Mujahid
• Moraes, Sergio
• Morgan, Todd
• Moustaghfir, Karim
• Mrad, Mona
• Muniz, Jorge
• Musarra, Giuseppe
• Najafi-Tavani, Zhaleh
• Nakata, Cheryl
• Navarro-García, Antonio
• Navimipour, Nima
• Nemkova, Ekaterina
• Nguyen, Thao
• Nummela, Niina
• Nwoba, Arinze
• Olabode, Oluwaseun
• Opazo, Marco
• Opoku, Robert
• Orlando, Beatrice
• Otterbring, Tobias
• Ozsomer, Aysegul
• Pantano, Eleonora
• Papa, Armando
• Papadopoulos, Nicolas
• Papadopoulos, Thanos
• Papadopoulou, Christina
• Papanastassiou, Marina
• Pappu, Ravi
• Park, Hyunhee
• Parvinen, Petri
• Paswan, Audhesh
• Patel, Parth
• Pehrsson, Anders
• Peng, Yi
• Penz, Elfriede
• Pereira, Vijay
• Petrescu, Maria
• Phong Tuan, Nham
• Pisani, Roberta
• Polonsky, Michael
• Popa, Simona
• Priporas, Constantinos
• Pueschel, Julia
• Purani, Keyoor
• Puri, Sandeep
• Rabetino, Rodrigo
• Rahman, Mahfuzur
• Reynolds, Nina
• Riefler, Petra
• Ripolles, Maria
• Robson, Matthew
• Rodgers, Peter
• Romanello, Rubina
• Rosas, Juan Francisco
• Roskilde, Shahamak Rezaei
• Safari, Aswo
• Samiee, Saeed
• Santoro, Gabriele
• Saridakis, Charalampos
• Sava, Maria
• Schivinski, Bruno
• Schlegelmilch, Bodo
• Schroeder, Jonathan
• Scuotto, Veronica
• Seidenfuss, Kai-Uwe
• Semaan, Rania
• Shah, Syed Alamdar Ali
• Shaikh, Shayan
• Shamim, Saqib
• Shams, Riad
• Shams, S. M. Riad
• Shoham, Amir
• Shukla, Paurav
• Siachou, Evangelia
• Siamagka, Nikoletta Theofania
• Simillidou, Aspasia
• Singh, Nitish
• Singh, Ramendra
• Singh, Sangeeta
• Singh, Sanjay
• Singh, Surabhi
• Sinkovics, Rudolf
• Sivakumar, K.
• Skandalis, Alexandros
• Smith, Katherine
• Sridadi, Ahmad Rizki
• Stathopoulou, Anastasia
• Steenkamp, Jan-Benedict
• Stephens, Aaron
• Stocchi, Lara
• Stoian, Cristina
• Story, Victoria
• Strehlau, Vivian
• Strizhakova, Yuliya
• Stylos, Nikolaos
• Sundaram, Selwyn
• Swoboda, Bernhard
• Szőcs, Ilona
• Tang, Ryan
• Tarhini, Ali
• Taylor, David
• Teerakapibal, Surat
• Theodosiou, Marios
• Thomas, Robert
• Thongpapanl, Narongsak
• Thrassou, Alkis
• Tiberius, Victor
• Torkkeli, Lasse
• Torkkeli, Lasse
• Trichina, Eleni
• Trott, Sangeeta
• Tsai, Huei-Ting
• Tsougkou, Eleni
• Tu, Yanbin
• Uddin, Moshfique
• Ul Haq, Junaid
• Valette-Florence, Pierre
• Vendrell-Herrero, Ferran
• Verlegh, Peeter
• Vianelli, Donata
• Vissak, Tiia
• Wach, Krzysztof
• Wallace, Elaine
• Walsh, Gianfranco
• Watson, Anna
• Wei, Yingqi
• Westjohn, Stanford
• Wilcox, Keith
• Wysong, Scott
• Yalcinkaya, Goksel
• Yaprak, Attila
• Yen, Dorothy
• Yildiz, Helene
• Zabkar, Vesna
• Zahoor, Nadia
• Zanbouri, Kouros
• Zdravkovic, Srdan
• Zeugner-Roth, Katharina
• Zolfagharian, Mohammadali