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:

• Aamir, Alamzeb
• Abbas, Asad
• Abd.Ghani, Mazuri
• Abdallah, Yasser
• Abdolvand, Neda
• Abdulkader, Bisan
• Abdulsaheb, Dr. Ghaidaa
• Abeygunasekera, Ahangama
• Abu-Rumman, Ayman
• Abubakre, Mumin
• Abueid, Raed
• Acharya, Chandan 
• Acquah, Innocent Senyo Kwasi
• Adam, Fred
• Adam, Frederic
• Afshan, Gul
• Afum, Ebenezer
• Afzal, Ayesha
• Agarwal, Ashish
• Ahmad, Hartini
• Ahmed  , Arif 
• Ahmed, Naveed
• Ahmed, Prof. Farid
• Ahmed, Selim 
• Akmal, Adeel
• Akram, Umair
• Al Shraah , Ata
• Al-Amin, Abul
• Al-Ayed, Sura
• Al-Faryan, Mamdouh Abdulaziz Saleh 
• Alaeddini, Morteza
• Aldhyani , Theyazn
• Alfirevic, Niksa
• Alhayanii, Bilal
• Ali, Atif
• Ali, Mudassar
• Ali, Omar
• Alieva, Jamila
• Alles, Michael
• Almulhim, Abdullah
• Alnoor, Alhamzah
• Alnuaimi, Bader K. 
• Aloini, Davide
• Alotaibi, Youseef
• Alsharari, Nizar
• Ametepe, Paul
• Anastassiu, Monica
• Anaya, Luay
• Anholon, Rosley
• Annamalai, Chockalingam
• Arroyo-López, Pilar
• Arun, Korhan
• Asarian, Mohammad 
• Astanti, Ririn Diar
• Atsa Etoundi, Roger
• Aveiro, David
• Awais Ilyas, Awais Ilyas
• Ayachi-Ghannouchi, Sonia
• Aydiner, Arafat Salih 
• Azhary, Ehab
• Badakhshan, Peyman
• Baiao, Fernanda
• Bakhteeyar, Ir. Hale
• Baki, Birdogan
• Bakry, Saad
• Bandara, Madhushi 
• Bando, Ayesha Bando
• Bansal, Veena 
• Barakka, Ezzat 
• Barkaoui, Kamel 
• Barron, Katelin
• Barros, Oscar
• Barykin, Sergei
• Bazan, Patricia
• Belayutham, Sheila 
• Belchior, Rafael
• Belhadi, Amine
• Benevento, Elisabetta
• Berraies, Sarra
• Bertello, Alberto
• Bertolin Furstenau, Leonardo
• Bhanot, Astha
• Bhatti, Mansoor Nazir
• Bhola, Prabha
• Bhosale, Vishal
• Bilal, Muhammad
• Birungi Komunda, Mabel
• Boon-Itt, Sakun
• Bosilj Vuksic, Vesna
• Bouwman, Harry
• Breese, Richard 
• Bresciani, Stefano
• Brito Ribeiro, Luiz
• Brown, Nancy A.
• Caforio, Antonio
• Cagnin, Maria Istela
• Cammarano, Antonello
• Campos, Fernando
• Canonico, Paolo
• Capurro, Rosita
• Caputo, Andrea
• Carrilho, Tiago 
• Chiarello, Filippo
• Chua, Fang-Fang 
• Chugh, Ritesh
• Chupradit, Supat
• Cillo, Valentina
• Corallo, Angelo
• Coşkunçay, Ahmet
• Costa, Carlos J. 
• Cruz González, Joan
• Cruz, Jose
• D'andreamatteo, Antonio
• Dahmani, Noureddine
• Dallagnol, Mathaus
• Dani, Vinicius Stein 
• Dar, Afzal
• De La Torre-Romero, Martha
• De Man, Henk 
• De Mello, Renato
• De, Debashree 
• Dedeoglu, Volkan
• Demirel, Demokaan
• Deokar, Amit
• Dogar, Adnan
• Dos Santos, Carlos
• Dou, Junpeng
• Duc Nguyen, Viet
• E.Khedr, Ayman
• Eden, Rebekah
• El Amrani, Redouane
• El Hadj Amor, Emna
• Elandaloussi, Zineb
• Eldridge, Stephen
• Elshamly, Amina
• Elsheikh, Ahmed
• Emielu, Emmanuel
• Erixon, Cecilia
• Espino Rodríguez, Tomás
• Etoundi, Roger
• Faisal, Mohd. Nishat
• Fantinato, Marcelo
• Farhan, Najib H. 
• Faried, Awaid 
• Fernández-López, Sara 
• Ferreira, António
• Ferri, Luca
• Fiano, Fabio
• Filippelli, Serena 
• Fiorentino, Raffaele
• Flinkman, Arja
• Flinkman, Arja
• Forliano, Canio
• Frega, José
• Freij, Ake
• Fresner, Johannes
• Galimberti, Maurício
• Garmann-Johnsen, Niels
• Garzella, Stefano
• Gayialis, Sotiris
• Gersch, Martin
• Ghasemi, Behzad
• Gomes, Carlos
• Gonzalez-Lopez, Fernanda
• Goyal, Dr S B
• Grisold, Thomas
• Gu, Shengyu
• Guadamillas, Fatima 
• Guceglioglu, A. Selcuk
• Guerreiro, Sérgio
• Gul, Rani 
• Gupta, Manish
• Haghighi, S. Motevali 
• Hamadah, Abduelmoujood  
• Hamidizadeh, Mohammad
• Hanafizadeh, Payam
• Hanson, Nicole 
• Harb, Yousra
• Hasan, Md
• Hashim, Noorul Hafizah
• Haussler Carneiro Ramos, Karoll
• Hawamdeh, Suliman
• Hayat Khan, Huma 
• Hellingrath, Bernd
• Hetmanczyk, Piotr
• Hossain, Md Rahat
• Hossain, Md Shamim
• Houy, Constantin
• Hsu, Chingchi
• Hussain, Khawar 
• Idris, Isma'il Tijjani
• Ikeda, Erika
• Indihar Štemberger, Mojca
• Iqbal Queshi, Naila 
• Iqbal, Shuja
• Jaafar, Harlina Suzana 
• Jabeen, Fauzia
• Janiesch, Christian
• Jariwala, Vijay
• Jasimuddin, Sajjad M. 
• Javaid, Mudaser
• Javed, Mohsin
• Javidroozi, Vahid
• Jawarneh,  Nader 
• Jiang, Yawei
• Jiwangkura, Sujita
• Johanndeiter, Thomas
• Johennesse, Lee-Anne
• Kader, Romana
• Kam   Chan, Kam   Chan
• Kamran, Muhammad 
• Kandpal, Vinay
• Kannengiesser, Udo
• Kargar Shouraki, Mohammad
• Kazemian, Soheil
• Khalaf, Osamah
• Khalid, Zunera 
• Khalili, Amjad
• Khan, Faisal 
• Khan, Md
• Khan, Muhammad Munem 
• Khanbabaei, Mohammad
• Khider, Hadjer
• Khizar, Umbreen
• Khlif, Wiem
• Kitsios, Fotis
• Klöckner, Maximilian
• Kogut, Clarice Secches 
• Kratsch, Wolfgang
• Kreuter, Tobias
• Kumar , Ravinder
• Kumar, Rakesh
• Kung, Peter
• Lacerda, Rogerio
• Lagstedt, Altti
• Lai, Ming-Fong
• Lai, Sn-Man
• Lapina, Inga
• Larif, Sana
• Latif, Khawaja Fawad
• Le, Phong
• Ledesma, Javier
• Leemans, Sander
• Leitão, Thiago
• Leite, Julio
• Lenuwat, Pattama
• Leyer, Michael
• Li, Shuangyan
• Li, Spencer 
• Liu, Yanping 
• Lopes, Nuno
• Luo, Na
• Machado, Marcia
• Machado, Maria Augusta
• Magni, Domitilla
• Mahmood, Hamid
• Malik, Mehwish
• Malik, Muhammad
• Margherita, Alessandro
• Martinez, Felipe
• Martins, José
• Masrek, Mohamad Noorman
• Masum, Noor
• Mathrani, Sanjay
• Mazzoleni, Alberto
• Mccormack, Kevin
• Mehrajunnisa, Mehrajunnisa
• Melao, Nuno
• Meriton, Roy
• Migdadi, Mahmoud
• Mijač, Tea
• Mohanraj, Prasanna Sai
• Mohd-Sanusi, Zuraidah
• Mohsin  Raza, Mohsin  Raza
• Mok, Wai
• Mosleh, Mogeeb 
• Mozafari Mehr, Azadeh Sadat
• Mukred, Muaadh
• Müller, Cláudio
• Muntaka, Abul
• Murungi, David 
• Mutum, Dilip
• Mwanza,  Bupe Mutono 
• Naharin, Farjana 
• Najmi, Arsalan
• Nakandala, Dilupa
• Narvel, Yahya
• Naseem, Sobia 
• Nawaz, Muhammad Atif
• Nazam, Muhammad
• Ngniatedema, Thomas
• Nikolaidou, Mara
• Nikou, Shahrokh
• Nirino, Niccolò 
• Nold, Herb
• Nor Diana, M.I.
• Norrman, Andreas
• Nozari, Hamed
• Núñez-Ríos, Juan E.
• Obiedat, Abdullah
• Oladapo, Ibrahim Abiodun
• Olivares-Benitez, Elias 
• Oliveira, Hime
• Oliveira, Josenildo
• Onyia, Valerie
• Orji, Ifeyinwa
• Ortiz-De-Urbina-Criado, Marta
• Osei, Vivian
• Ouakouak, Mohamed Laid
• Özdağoğlu, Güzin
• Ozkan, Baris
• Pádua, Silvia Inês
• Paim, Rafael
• Parmentola, Adele
• Parthasarathy, Sudhaman
• Pereira, Rúben
• Philbin, Simon
• Pimenta, Marcio
• Piya, Sujan
• Plattfaut, Ralf
• Polini, Andrea
• Porfírio, José
• Powell, Daryl 
• Pramod, Dhanya
• Puthuruthy, Arjun
• Qiu, Yunzhe
• Quasem, Abul 
• Rabelo, Ricardo
• Rahman, Mahfuzur 
• Rajadurai, Benet
• Rakshit, Sandip
• Ramadan , Qusai 
• Rambaud, Salvador Cruz 
• Rane, Milind  
• Rangiha, Mohammad
• Rasheed, Muhammad Imran
• Rashid, Ibrahim
• Rashid, Muhammad   
• Raucci, Domenico
• Regi, S. Bulomine 
• Riaz, Muhammad
• Riungu, Anselm
• Riva, Angelo
• Rizwan., Faisal 
• Rodriguez, Rocio
• Rodríguez, Rocio 
• Romero Juarez, Susana
• Rossi, Matteo
• Roy, Shirshendu
• Rutherford, Brian N. 
• Sadiq, Muhammad
• Sahibzada, Umar
• Salviano, Clenio
• Samaranayake, Premaratne
• Santoro, Flavia
• Santoro, Gabriele
• Santos, Carlos
• Sardar, Muhammad Fahad
• Savage, Barbara
• Schaschek, Myriam
• Schlegel, Dennis
• Setthasakko, Watchaneeporn
• Shafique, Imran
• Shahzadi, Anum
• Shariq, Syed Muhammad 
• Shen, Jun
• Shetty, Ankitha
• Shin, Nina 
• Shirouyehzad, Hadi
• Sikombe, Shem
• Singer, Robert
• Singh, Rohit
• Skouloudis, Antonis
• Sliż, Piotr
• Solina, Vittorio 
• Spasojevic Brkic, Vesna
• Sreenu, Nenavath
• Stefanini, Alessandro
• Stolze, Carl
• Sukamani, Dinesh
• Takala, Josu
• Takenaka, Takeshi 
• Talib, Faisal
• Tan, Boon Leing
• Tchokogué, Andre
• Telles, Renato
• Terstriep, Judith 
• Thareja, Priyavrat
• Thennakoon, Dharshani
• Thomas, Ashish
• Tieman, Marco 
• Tomaskova, Hana
• Tran, Thuan Minh
• Tranekjer, Tina
• Tripathi, Shubham
• Trivedi, Sonal 
• Trudel, Sylvie
• Tufail, Muhammad 
• Tumminelli, Giuseppe
• Tutore, Ilaria
• Tzu-Ya Ho, Tzu-Ya Ho
• Uriona Maldonado, Mauricio
• Varajão, João
• Varela-Vaca, Angel Jesus
• Veiga, Claudimar
• Velásquez, Ignacio
• Vera, Antonio
• Verschueren, Ricardo
• Vikraman, Vignaraj Ananth 
• Vishwakarma, Niraj
• Von Haartman, Robin
• Wahaj, Zujaja
• Wang, Huan
• Waqas Sadiq, Muhammad
• Weidlich, Robin
• Wewerka, Judith
• Whitaker, Jonathan 
• Wickramasinghe, Vathsala
• Wynn, Moe
• Yahya, Fadwa
• Yang Li, Yang Li
• Yang, Biao
• Yang, Xiudan
• Yanuarifiani, Amarilis Putri
• Yasir , Muhammad
• Ye, Yuxiao
• Zare, Mansoureh
• Zebec, Aleš
• Zhang, Xinyan
• Zhong, Jianlan
• Zia, M Azam
• Zouari , Dorsaf