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:

• Abbas, Jaffar
• Abbas, Ansar
• Abed, Sameera
• Aberra, Tsige
• Abubakar, Ismaila
• Acero, Andrés 
• Addaney, Michael
• Adhikari, Dev Raj
• Adom, Dickson
• Adusu, Daniel
• Afacan, Yasemin
• Aggestam-Pontoppidan, Caroline
• Ahonen, Veronica
• Aigbavboa, Clinton
• Aina, Yusuf
• Aksan, Zeynep
• Aktas, Can
• Al Mamun, Abdullah
• Ala Eddin, Mohammed Issa
• Alagarsamy, Subburaj
• Alamri, Mahdi
• Albareda Tiana, Silvia
• Aleixo, Ana Marta
• Alfaro, Jose
• Alford, Jennifer
• Aliu, John
• Allahyari, Mohammad Sadegh
• Allen, Jennifer
• Almeida, António
• Altieri, Diego
• Amaro, Nelson
• Amicone, Giulia
• Anane, George Kwadwo
• Anaya, Carlos
• Anderson, Lindsey
• Andrade Guerra, José Baltazar
• Andrades, Javier
• Andrews, Deborah
• Anholon, Rosley
• Anholon, Rosley
• Appiah, Eddie
• Arefin, Md. Arman
• Armstrong, Cosette
• Arruda Filho, Norman
• Arthur, Jones
• Arto-Blanco, Monica
• Aung, Pwint Nee
• Avelar, Aline
• Avila, Lucas
• Avolio, Beatrice
• Avruj, Luz
• Awuzie, Bankole
• Ayuso, Silvia
• Azeiteiro, Ulisses
• Aziz, Sarah
• Azizi, Leyla
• Baeza, Ana
• Bagaeen, Samer
• Bagoly-Simó, Péter
• Bagul, Awangku
• Baier, Andre
• Balakrishnan, Balamuralithara
• Barbosa, Sabrina
• Barbosa, Samuel
• Barnes, Jonathan
• Barpanda, Saswat
• Barrantes Briceno, Christian Eric
• Barreiro-Gen, Maria
• Barrett, Heather
• Barrett, Martin
• Barros, Murillo
• Bayram, İlknur
• Beck, Peter
• Bello Benavides, Laura Odila
• Bentham, Hayley
• Berker, Thomas
• Bhandari, Medani
• Biasutti, Michele
• Birch, Robert
• Birdman, Jodie
• Blanco-Portela, Norka
• Blaskova, Martina
• Blättel-Mink, Birgit
• Boluk, Karla
• Bonazzi Piasentin, Flora
• Bonoli, Alessandra
• Bookhart, Davis
• Booth, Annie
• Booth, Annie
• Borden, D. Scott
• Brandli, Luciana
• Brantmeier, Edward
• Briandana, Rizki
• Bryant, Jayne
• Buil-Fabregá, Marian
• Burnley, Stephen
• Caeiro, Sandra
• Callewaert, John
• Calzado, Yolanda
• Caputo, Andrea
• Cardoso, Etienne
• Carow, Sanet
• Carrière, E.
• Casares-Gallego, Amparo
• Castro, May Portuguez
• Cavicchi, Caterina
• Cebrián, Gisela
• Cezarino, Luciana
• Chaleta, Elisa
• Chan, Wendy
• Chase, Geoffrey
• Cheang, Chi-Chiu
• Chen, Chen
• Chiu, Dickson K. W.
• Chiu, Yiwen
• Choate, Beth
• Civera, Alice
• Claes, Merel
• Codina, Lluís
• Coelen, Robert
• Cogut, Gregory
• Cohen, Benjamin
• Čolić, Ratka
• Consorte-Mccrea, Adriana
• Corazza, Laura
• Córdoba-Pachón, José-Rodrigo
• Cordova, Miguel
• Correia, Elisabete
• Cortes, Juan Alejandro
• Cuaresma, Jocelyn
• Da Costa, Stella
• Da Silva, Izael
• Dabija, Ana-Maria
• Dal Moro, Leila
• Dalbelo, Thalita
• Daly, Kimberley
• Dambiski Gomes De Carvalho, Gustavo
• Damke, Luana
• De Jager, A.
• De Loof, Haydée
• Deb, Papiya
• Dehghanmongabadi, Abolfazl
• Deleye, Maarten
• Diaz-Sarachaga, Jose Manuel
• Diego, Sara
• Diethart, Mario
• Dinis, Maria Alzira Pimenta
• Doan, My Hanh
• Dong, Yizhe
• Dost Muhammad, Abida
• Druckman, Angela
• Duah, Daniel
• Dubey, Chhabi
• Dutra, Ana Regina
• Dutra, Ana Regina Aguiar
• Dyllick, Thomas
• Edis, Ecem
• Eggermont, Marjan
• Elawamri, Yomna
• Emblen-Perry, Kay
• Escámez Marsilla , Juan
• Eugenio-Gozalbo, Marcia
• Eustachio, João
• Evans, Neus
• Faghihi, Vahid
• Faibil, Daniel
• Fam, Dena
• Farinha, Carla
• Fathi, Mastoureh
• Fedi, Angela
• Feldman, Ira
• Fellner, Magdalena
• Fialho, Isabel
• Fissi, Silvia
• Fitzsimons, Camilla
• Flórez-Parra, Jesús Mauricio
• Fornasari, Tommaso
• Francisco, Ana
• Franco, Dirk
• Frandoloso, Marcos Antonio
• Froholdt, Lisa
• G, John
• G, Kathiresan
• Gagliano, Annette
• Gago-Cortés  , Carmen
• Galleli, Barbara
• Gatto, Andrea
• Genta, Chiara
• George, David
• Gericke, N.
• Giesenbauer, Bror
• Giloi, Susan
• Gliedt, Travis
• Glover, Alison
• Godemann, Jasmin
• Gomes, Bárbara
• González Couret, Dania
• González-Campo, María José
• González-Torre, Pilar
• Gou, Zhonghua
• Goyal, Rita
• Greig, Alison
• Grindsted, Thomas
• Gross, Evelyne
• Grosseck, Gabriela
• Grover, Robert
• Guerra, Aida
• Guerra, Baltazar
• Guerrero Sierra, Hugo Fernando
• Gunawan, Juniati
• Guo, Yuang
• Gupta, Manish
• Gupta, Manisha
• Hacioglu Kazak, Evrim
• Hale, Annie
• Hallinger, Philip
• Hansen, Brooke
• Harmon, Alison
• Harmon, Renee
• Hart, Timothy
• Hasanefendic, Sandra
• Hasani Alavy, Elham
• Haxton, Katherine
• Hazelkorn, Ellen
• Hazenberg, Richard
• Hegarty, Kathryn
• Heikkurinen, Pasi
• Hernandez-Diaz, Paula M.
• Herremans, Irene
• Herzner, Dr Alexander
• Hindley, Ann
• Ho, Susie
• Hoefel, Joao
• Holzbaur, Ulrich
• Hope, Alex
• Hota, Pradeep
• Hourneaux Junior, Flavio
• Huang, Xuan
• Huge, Jean
• Hull, Robert
• Hüske, Anne-Karen
• Hussein, Khalid
• Ilisko, Dzintra
• Imaz, Mireya
• James, Valentine
• Jarchow, Meghann
• Jiménez-Fontana, Rocío
• Johansson, Tino
• Jones, Heather
• Jorge, Susana
• Joshi, Yatish
• Kang, Alexandra, S.
• Karamidehkordi, Esmail
• Karrow, Douglas
• Kekez, Anke
• Kemp, Nicola
• Khan, Tehmina
• Khanzode, Kirti
• Khong-Khai, Sutthikarn
• Kiran, Ravi
• Koh, Hocklye
• Kolmes, Steve
• Kouhia, Anna
• Kozlova, Valerija
• Kucuksayrac, Elif
• Kuknor, Sunaina
• Kutlu Furtuna, Ozlem
• Kwakye, Teddy
• Kyriakopoulos, Grigorios
• La Barbera, Francesco
• Lambrechts, Wim
• Lane, Andy
• Larran, Manuel
• Laske, Stephan
• Laurett, Rozelia
• Lee, Khai Ern
• Lehrer, David
• Levasseur, Todd
• Levesque, Vanessa
• Li, Yuh-Yuh
• Liddy, Mags
• Lin, Chi-I
• Lin, Ching-Te
• Lindau, Anne-Kathrin
• Loiola, Gustavo
• Lombard, Andrea
• Londhe, B.R.
• Lovren, Violeta
• Lozano, Rodrigo
• Mac-Lean, Claudia
• Maceno, Marcell
• Madeira, Ana
• Madzík, Peter
• Magalhães, António
• Mahdi, Omar Rabeea
• Maina-Okori, Naomi
• Maistry, Nandarani
• Maluleka, Khazamula
• Mammadova, Aida
• Manasia, Loredana
• Manolas, Evangelos
• Manresa, Alba
• Marcinkowski, Thomas
• Marques Da Silva, Sofia
• Marshall, Judi
• Martin, Frances
• Martínez-González, Raquel-Amaya
• Martins, Vitor
• Maskey, Vishakha
• Mason, Michel
• Matus-Parada, Jaime
• Mawonde, Albert
• Mazon, Gisele
• Mazutti, Janaina
• Mccoshan, Andrew
• Mckenna, Kelly
• Meehan, Bart
• Meiriño, Marcelo
• Mendoza-Cavazos, Yolanda
• Mensah, Caleb
• Mi, Lingyun
• Mifsud, Mark
• Miller, Jon D.
• Milupi, I. D.
• Minutolo, Marcel
• Miotto, Giorgia
• Moggi, Sara
• Mohamedbai, Goolam
• Mohammadalizadehkorde, Milad
• Molthan-Hill, Petra
• Monteiro, Sónia
• Morawska-Jancelewicz, Joanna
• Moschen, Suane
• Moyo, Inocent
• Munguia, Nora
• Nagy, Gustavo 
• Nakazwe, Matilda
• Nandhivarman, M.
• Narodoslawsky, Michael
• Ndlovu, Tabani
• Ng, Artie
• Ng, Peggy
• Ng, Theam Foo
• Nicolau, Melanie
• Nikolic, Vesna
• Novo-Corti, Isabel
• Nunez, Enrique
• Nuong, Mildred Deri
• Nyerere, Jackline
• Okyere, Seth Asare
• Olweny, Mark
• Ongare, David
• Onyido, Tochukwu Ben C
• Opoku, Alex
• Orlovic Lovren, Violeta
• Owosuyi, Ifeoma Laura
• Ozturk, Mustafa
• Öztürk, Mustafa
• Pace, Paul
• Pacheco, Elen
• Paço, Arminda
• Pagden, Alan
• Pais, Sofia
• Paleari, Stefano
• Pallant, Eric
• Palma, Lisiane
• Panait, Mirela
• Pandey, Sharadindu
• Paradowska, Monika
• Pausits, Attila
• Pavan Serafim, Milena
• Peña, Marta
• Perbandt, Daniela
• Perera, Chamila
• Perkins, Krystal
• Petersen, John
• Petkova, Kristina
• Piekarski, Cassiano
• Pienaar, Richelle
• Pietikäinen, Janna
• Pilinkienė, Vaida
• Plate, Richard
• Poldma, Tiiu
• Poon, Joanna
• Poyyamoli, G.
• Pramodh, Sreepoorna
• Pretorius, Rudi
• Probst, Lorenz
• Puertas, Rosa
• Purcell, Wendy
• Qu, Zejing
• Quelhas, Osvaldo Luiz Gonçalves
• Quesada, Carla
• Raimi, Lukman
• Rambaree, Komalsingh
• Rameder, Paul
• Ramirez Cajiao, Ma. Catalina
• Ramísio, Paulo
• Rampasso, Izabela Simon
• Rangel, Barbara
• Ranson, Heather
• Reddy, K. S.
• Reeves, Andrew
• Reginatto, Giovana
• Richter, Torsten
• Riggs, William
• Rocha, Helena
• Rodriguez, Lucia
• Romano, Alessandra
• Roos, Nicolas
• Rowlandson, William
• Rugel, Santos
• Ryan-Fogarty, Yvonne
• Sageidet, Barbara Maria
• Salovaara, Janne
• Salvia, Amanda
• Saraiva, Linda
• Saraiva, Margarida
• Sassen, Remmer
• Savelyeva, Tamara
• Segalas, Jordi
• Servant-Miklos, Virginie
• Shephard, Kerry
• Shiel, Chris
• Shields, Robin
• Shree, Sonal
• Sierra-Garcia, Laura
• Sierra, Javier
• Sigahi, Tiago
• Siller, Thomas J.
• Silva, Dirceu
• Sima, Mihaela
• Sima, Mihaela
• Simaens, Ana
• Sinakou, Eleni
• Singh, Bikram Jit
• Singh, Prashant
• Sivapalan, Subarna
• So, Stuart
• Sonetti, Giulia
• Spire, Zachery
• Srebotnjak, Tanja
• Stanton, Audrey
• Steuer, Chris
• Storey Houlihan, Meredith
• Suárez-Collado, Ángela
• Suh, Heejoo
• Sun, Qin
• Taljaard-Swart, Hanri
• Tang, Kuok Ho Daniel
• Tarrant, Seaton
• Tassone, Valentina C.
• Teh, Su Yean
• Telesford, John
• Tezcan, Nuray
• Thiel, Monica
• Thornton, Kate
• Tibola Da Rocha, Vanessa
• Tillmanns, Tanja
• Tiwari, Preeti
• Tiyarattanachai, Ronnachai
• Togo, Muchaiteyi
• Tommasetti, Roberto
• Trædal, Leif Tore
• Tripp, Winston
• Trivedi, Rajvi
• Usama, Awan
• Väänänen, Niina
• Valderrama-Hernández, Rocio
• Vallaeys, François
• Van Der Vaart, Rob
• Vargas, Valeria
• Vasconcelos, Claudio Ruy Portela De
• Veiga Ávila, Lucas
• Veiga, Amelia
• Velazquez, Luis
• Venkatesan, Madhavi
• Verhoff, Brandon
• Viere, Tobias
• Vlachopoulos, Dimitrios
• Vujakovic, Peter
• Vukic, Tamara
• Waas, Tom
• Wakkee, Ingrid
• Walvoord, Mark
• Wang, Xinchun
• Webster, Noah
• Weidman, John
• Weiss, Marie
• Werner, Marx
• Whitney, Mary
• Whyte, William
• Will, Markus
• Wireko-Gyebi, Rejoice
• Wodika, Alicia
• Woelfel, Christian
• Xiong, Weiyan
• Yaakub, Muhammad
• Yang, Minghui
• Yelo, Blanca
• Yılmaz Fındık, Leyla
• Zanellato, Gianluca
• Zeegers, Yvonne
• Zhang, Jian
• Zhu, Bifeng
• Zidny, Robby
• Zilbovicius, Mauro