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:

• Abbasianjahromi, Hamidreza
• Abd Elkawy, Abeer
• Abdel-Hamid, Mohamed
• Abdirad, Hamid
• Abdul Latip, Normah
• Abdul-Aziz, Abdul-Rashid
• Abdul-Malak, Mohamed-Asem
• Abedi, Mohammad
• Abi Shdid, Caesar
• Abisuga, Olatunji
• Abraham, Yewande
• Abrishami, Sepehr
• Abu-Khader, Waleed
• Abu-Samra, Soliman
• Acharya, Nirmal
• Adabre, Michael
• Adaku, Ebenezer
• Adekunle, Samuel
• Adesi, Michael
• Adhazie, Divine
• Adinyira, Emmanuel
• Agdas, Duzgun
• Aghimien, Douglas
• Aghimien, Emmanuel
• Agirbas, Asli
• Agyekum, Kofi
• Ahiaga-Dagbui, Dominic
• Ahmad, Syed Ishtiaq
• Ahmadian Fard Fini, Alireza
• Ahmadu, Hassan
• Ahmed, Wahhaj
• Ahn, Seungjun
• Aigbavboa, Clinton
• Aka, Adefemi
• Akanmu, Abiola
• Akomea-Frimpong, Isaac
• Akosubo, Iwekumo
• Aksel Cicekci, Havva
• Aksorn, Preenithi
• Al Mamlook, Rabia
• Al Mohsin, Mohammed
• Al-Alawi, Mubarak
• Al-Saeed, Yahya
• Al-Saggaf, Abdullah
• Al-Tameemi, Khaldoon
• Alade, Kehinde
• Alaka, Hafiz
• Alaloul, Wesam
• Alavipour, S. M. Reza
• Albayrak, Gülçağ
• Albeaino, Gilles
• Albert, Alex
• Alberte, Elaine
• Ali, Azlan
• Aliu, John
• Alizadehsalehi, Sepehr
• Alleman, Douglas
• Allinson, David
• Almashaqbeh, Mohammad
• Alves Tenório De Morais, Gabriela
• Alves, Thais
• Alwisy, Aladdin
• Ameli, Alireza
• Ameyaw, Collins
• Ammar, Mohammad
• Amos-Abanyie, Samuel
• Amoudi, Omar
• Anandh, K. S.
• Anondho, Basuki
• Ansah, Richard Hannis
• Ansari, Ramin
• Antoniadis, Dimitris
• Antwi-Afari, Maxwell Fordjour
• Arashpour, Mehrdad
• Arayici, Yusuf
• Arditi, David
• Arewah, Andy
• Arslan, Volkan
• Artan, Deniz
• As'ad, Rami
• Ashiq, Syed
• Ashuri, Baabak
• Assefa, Sintayehu
• Awuzie, Bankole
• Ayarkwa, Joshua
• Aydınlı, Serkan
• Azarang, Hosien
• Azman, Mohd Azrai
• Bajjou, Mohamed Saad
• Bakhshi, Javad
• Balaban-Okten, Burcu
• Baldauf, Juliana
• Bannazadeh, Bahareh
• Bao, Fengyu
• Baroudi, Bassam
• Bastos Costa, Dayana
• Bausman, Dennis
• Beach, Thomas
• Behm, Michael
• Belayutham, Sheila
• Bettemir, Önder
• Bhandari, Harveen
• Binti Aziz, Nur Mardhiyah
• Biscaya, Sara
• Boateng, Emmanuel
• Bolomope, Muhammed
• Borg, Jessica
• Borhani, Ali
• Bostancioglu, Esra
• Brandao, Rayra
• Brett, Richard
• Brito, Douglas
• Bulbul, Tanyel
• Calvetti, Diego
• Cao, Dongqiang
• Cao, Weidong
• Carmichael, David G.
• Carrillo, Pat
• Castronovo, Fadi
• Chan, Albert P. C.
• Chan, Melissa
• Chang, Rui-Dong
• Chang, Tengyuan
• Chang, Wei
• Chang, Yuan
• Charoenngam, Chotchai
• Che Ibrahim, Che Khairil Izam
• Chekol, Daniel Alemayehu
• Chen, Chang-Ray
• Chen, Guangchong
• Chen, Hongquan
• Chen, Julie
• Chen, Junjie
• Chen, Ke
• Chen, Le
• Chen, Qian
• Chen, Wei
• Chen, Yong
• Chen, Yuting
• Chen, Zhen
• Cheung, Sai On
• Chia, Fah Choy
• Chih, Ying-Yi
• Chileshe, Nicholas
• Chinda, Thanwadee
• Cho, Yong
• Chong, Heap-Yih
• Chourasia, Ajay
• Chow, Vivien
• Christofferson, Jay
• Clevenger, Caroline
• Comu, Semra
• Cong, Xuhui
• Cook, Malcolm
• Corrao, Rossella
• Costella, Marcelo
• Cui, Qinghong
• Cui, Zhipeng
• Dang, Chau
• Daniel, Emmanuel Itodo
• Davies, Kathryn
• Davis, Peter
• De Paula, Nathália
• De Silva, Mavin
• Debrah, Caleb
• Debs, Luciana
• Deepak, M. S.
• Dehdasht, Golamreza
• Delhi, Venkata
• Demirkesen, Sevilay
• Deng, Xiaopeng
• Deng, Yichuan
• Dharmayanti, Gusti
• Dikmen, Irem
• Ding, Jiyong
• Do, Sy
• Doan, Dat
• Dong, Jianjun
• Dong, Shuang
• Du, Hua
• Du, Juan
• Dulaimi, Mohammed
• Durdyev, Serdar
• Edum Fotwe, Francis
• Edwards, David
• Ejohwomu, Obuks
• Ekanayake, E. M. A. C.
• El-Adaway, Islam
• El-Kholy, Amr
• Eliufo, Harriet
• Emuze, Fidelis
• Emuze, Fidelis
• Eren, Fatih
• Ergen, Esin
• Eshun, Bridget Tawiah Badu
• Esmaeili, Behzad
• Eze, Emmanuel
• Fabi, Jonathan
• Fadeyi, Ayomipo
• Fan, Hongqin
• Fang, Yihai
• Faure, Julie
• Feng, Ke
• Fenn, Peter
• Florez-Perez, Laura
• Forcael, Eric
• Forgues, Daniel
• Formoso, Carlos
• Fu, Meiqing
• Fung, Ivan
• Gabriel, Hamza
• Gale, Keith
• Gan, Xiao-Long
• Gao, Ran
• Gao, Shang
• Garrido Martins, Claudia
• Gelder, John
• Georgakis, Panos
• Ghansah, Frank
• Gharaie, Ehsan
• Gharbia, Marwan
• Gheisari, Masoud
• Ghodrati, Nariman
• Ghosh, Somik
• Gnananandarao, Gnananandarao
• Gois Santos, Debora
• González, Vicente
• Gorod, Alex
• Gu, Ning
• Gu, Weibin
• Gul, Saleem
• Güler, Soner
• Gunawan, Indra
• Gunawardhana, Terans
• Guo, Shengyu
• Gupta, Sakshi
• Gurgun, Asli
• Gurmu, Argaw
• Gursel Dino, Ipek
• Gusmao Brissi, Sara
• Habibi, Farhad
• Habibi, Shahryar
• Hadiwattege, Chandanie
• Hamida, Amneh
• Hammad, Ahmed
• Hammond, Samuel
• Hamzeh, Farook
• Han, Kevin
• Han, Yilong
• Hao, Jianli
• Hardie, Mary
• Hartmann, Timo
• Hasan, Abid
• Hasanzadeh, Sogand
• Hassanein, Amr
• Hatamleh, Muhammad T.
• He, Nanjun
• Hedjazi, Saman
• Hentschke, Cynthia
• Hermann, Rick
• Hiyassat, Mohammed
• Hon, Carol K. H.
• Hopkin, Tony
• Horner, Malcolm
• Hossain, Md. Mehrab
• Hosseini, M. Reza
• Hosseinian, Amir Hossein
• Hosseinian, S. Mahdi
• Hou, Lei
• Hu, Lamei
• Hu, Shi
• Hu, Xin
• Hu, Xuan
• Hu, Yuqing
• Huang, Yao
• Hunhevicz, Jens Juri
• Hwang, Bon-Gang
• Igwe, Charles
• Ikediashi, Dubem
• Ikram, Muhammad
• Ilahi, Muhammad
• Inuwa, Ibrahim
• Iordanova, Ivanka
• Irfan, Muhammad
• Ishak, Salwa
• Isikdag, Umit
• Işık, Zeynep
• Iskandar, Karim
• Ismail, Zul-Atfi
• Izadi Moud, Hashem
• Jaafar, Mastura
• Jacob, Jeevan
• Jadidoleslami, Samereh
• Jagtap, Milind
• Jahani, Alireza
• Jang, Youjin
• Jaradat, Suha
• Jasim, Haider
• Javed, Arshad Ali
• Jayasinghe, Ruchini
• Jeelani, Idris
• Jefferies, Marcus
• Jensen, Kim
• Jensen, Kim
• Jia, Yunyan
• Jiang, Shan
• Jiang, Weiping
• Jin, Hongyu
• Jin, Ruoyu
• Jin, Xiaohua
• Jin, Ziyu
• Ju, Tianhao
• Jungmann, Manuel
• Juszczyk, Michal
• Jwad Saeed, Walaa
• K'akumu, Owiti
• Kalutara, Pushpitha
• Kamara, J. M.
• Kamara, John
• Kang, Youngcheol
• Kannimuthu, Marimuthu
• Kapogiannis, Georgios
• Karamoozian, Masood
• Karaz, Mahmoud
• Kasim, Narimah
• Kassem, Mohamad
• Kassem, Mukhtar A.
• Kavishe, Neema
• Kazar, Gokhan
• Ke, Yongjian
• Kermanshachi, Sharareh
• Keskin, Basak
• Khaki Ghasr, Azadeh
• Khalfan, Malik
• Khalilzadeh, Mohammad
• Khan, Ali Nawaz
• Khan, Naseer Abbas
• Khanh, Ha
• Khatleli, Nthatisi
• Khoso, Ali Raza
• Kibwami, Nathan
• Kim, Soo
• Kim, Sungjin
• Kineber, Ahmed
• Kio, Patricia
• Kirytopoulos, Konstantinos
• Klanšek, Uroš
• Koc, Kerim
• Kodikara Edirisinghe, Ruwini
• Koolwijk, Jelle
• Krishnankutty, Pramesh
• Krishnaraj, L.
• Kukah, Augustine
• Kumar, Bimal
• Kumar, Vishal
• Kurul, Esra
• Kwofie, Titus
• Kyei, Robert
• Laedre, Ola
• Lahdenperä, Pertti
• Laing, Richard
• Lantelme, Elvira
• Lantelme, Elvira
• Lee, Cen Ying
• Lee, Hsin-Yun
• Lee, Jin Gang
• Lee, Wonil
• Lee, Zheng Ping
• Leicht, Robert
• Li, Chun-Qing
• Li, Huimin
• Li, Hujun
• Li, Jue
• Li, Long
• Li, Meifang
• Li, Xiao
• Li, Xiaodong
• Li, Yongkui
• Li, Yulong
• Li, Zongzhi
• Liang, Qi
• Liao, Longhui
• Liao, Pin-Chao
• Lin, Han
• Lin, Jia-Rui
• Lindhard, Søren
• Ling, Florence
• Liu, Fanxiao
• Liu, Henry
• Liu, Hexu
• Liu, Junying
• Liu, Xiaoxiao
• Liu, Yisheng
• Liu, Ziwen
• Loganathan, Santhosh
• Lohne, Jardar
• Loosemore, Martin
• Lopes, Jorge
• Lu, Ming
• Lu, Shu-Ling
• Lu, Weisheng
• Lu, Weizhuo
• Lu, Xinrui
• Lu, Ying
• Lucko, Gunnar
• Luo, Jianing
• Luo, Lizi
• Luo, Ziyuan
• Luong, Long
• Luu, Van
• Luvara, Valentine
• Lyu, Sainan
• Ma, Li
• Macedo, Bruno
• Madson, Katherine
• Magdy, Mohamed
• Maghrebi, Mojtaba
• Mahalingam, Ashwin
• Mahamadu, Abdul-Majeed
• Mahdiyar, Amir
• Mahmud, Abba
• Majrouhi Sardroud, Javad
• Malek, Mohammedshakil
• Mandujano, Maria
• Manewa, Anupa
• Mangia, Mattia
• Mansuri, Lukman
• Manu, Patrick
• Marandi Alamdari, Ardalan
• Maraqa, Musab
• Marinoski, Deivis
• Maro, Godwin
• Marović, Ivan
• Martin, Clinton
• Martin, Hector
• Mashali, Ayman
• Masrom, Asrul
• Mateo-Garcia, Monica
• Maxwell, Duncan
• Mbachu, Jasper
• Mccarthy, Chrissi
• Mcclymonds, Austin
• Megahed, Naglaa
• Memon, Aftab
• Menassa, Carol
• Mendes, Julia
• Mensah, Sarfo
• Messner, John
• Miller, Seirgei
• Miron, Luciana
• Mohamed, Emad
• Mohamed, Mamdouh
• Mohammadi, Sina
• Mohammadian, Meghdad
• Mohandes, Saeed Reza
• Mohd Shafiei, Mohd Wira
• Mojtahedi, Mohammad
• Mokhtar Azizi, Nurul Sakina
• Momade, Mohammed Hamza
• Montalban-Domingo, Laura
• Moon, Sungkon
• Moreira, Felipe
• Moreira, Lorena Claudia
• Mostafa, Sherif
• Muhamad Halil, Faridah
• Muhwezi, Lawrence
• Muleya, Franco
• Munir, Mustapha
• Murguia, Danny
• Murray, Mike
• Musonda, Innocent
• Mutis, Ivan
• Naismith, Nicola Naismith
• Najjar, Mohammad
• Nana-Addy, Edward
• Narbaev, Timur
• Nawaz, Ahsan
• Nazari-Heris, Morteza
• Nazari, Ahad
• Ng, S. Thomas
• Nguyen, Duc
• Nguyen, Long
• Nguyen, Minh
• Nguyen, Viet
• Ni, Guodong
• Nielsen, Yasemin
• Ning, Xin
• Ning, Yan
• Niu, Yanliang
• Nnaemeka-Okeke, Rosemary
• Nnaji, Chukwuma
• Noghabaei, Mojtaba
• Noorzai, Esmatullah
• Norazman, Norsafiah
• Nwadigo, Okechukwu
• Nwodo, Martin
• Nzige, Juma
• Obi, Lovelin
• Ochieng, Edward
• Ogunrinde, Olugbenro
• Ogunsanya, Oluwabukunmi
• Øien, Turid
• Ojo, Lekan
• Ojo, Stephen
• Oke, Ayodeji
• Okoro, Chioma
• Okpala, Ifeanyi
• Okudan, Ozan
• Okunola, Olasunkanmi
• Oladinrin, Olugbenga
• Olanrewaju, Oludolapo
• Olawale, Yakubu
• Olawumi , Timothy
• Oliveira, Luciana
• Olofsson, Thomas
• Oloke, David
• Omar, Hany
• Omran, Abdelnaser
• Onubi, Hilary
• Opoku, Alex
• Opoku, De-Graft Joe
• Oshodi, Olalekan
• Oswald, David
• Ouyang, You
• Owusu, Emmanuel
• Oyetunji, Abiodun
• Ozcelik, Gokce
• Ozyurt, Beste
• Pacagnella Júnior, Antônio Carlos
• Padala, S. P. Sreenivas
• Pan, Mi
• Panuwatwanich, Kriengsak
• Panwar, Abhilasha
• Papadonikolaki, Eleni
• Papoyan, Atanes
• Pariafsai, Fatemeh
• Park, Eun Soo
• Patlakas, Panagiotis
• Patyal, Vishal Singh
• Pellegrino, Roberta
• Peltokorpi, Antti
• Pereira, Estacio
• Perera, Srinath
• Perez, Cristina
• Pérez, Cristina
• Petroutsatou, Kleopatra
• Pikas, Ergo
• Pinto, Gustavo
• Pinzon, Jerson
• Pirotti, Amjad
• Poleacovschi, Christina
• Poshdar, Mani
• Postay, Renata
• Prabakaran, P. A.
• Prajapati, Himanshu
• Prakash, Anand
• Pu, Wang
• Qiu, Yumin
• Radzi, Juwita
• Rafiean, Amir Hossein
• Rahimi, Yaser
• Rahiminezhad Galankashi, Masoud
• Rahman, Rahimi A.
• Rahmani, Farshid
• Rahnamayiezekavat, Payam
• Rajput, Babalu
• Rameezdeen, Raufdeen
• Ranasinghe, Udara
• Rankohi, Sara
• Rao, Ajith
• Rashid, Khandakar
• Rathi, Rajeev
• Rausch, Chris
• Ravindran, Gobinath
• Reifsnider, Elizabeth
• Renukappa, Suresh
• Reynoso Vanderhorst, Hamlet
• Rezaei, Sajad
• Ribeiro, Alexandre
• Roberts, Chris
• Rodrigues Santos De Melo, Roseneia
• Rodrigues, Maria
• Rojhani, Mahdi
• Roofigari, Nazila
• Roy, Debopam
• Sabiu, Baffa
• Sabry, Yasmine
• Sadat Mohammadi, Milad
• Sadikoglu, Emel
• Saeed, Tariq
• Sagoo, Amrit
• Said, Hisham
• Saka, Abdullahi
• Salah, Ahmad
• Sandanayake, Malindu
• Sandanayake, Yasangika
• Sankaran, Bharathwaj
• Sartipi, Farid
• Schramm, Fabio
• Schranz, Christian
• Schröpfer, Veronika
• Sebastian, Rizal
• Sekula, Przemyslaw
• Sellito, Miguel
• Semaan, Nabil
• Sepasgozar, Samad
• Seppänen, Olli
• Setiawan, Harijanto
• Seyrfar, Abolfazl
• Sezer, Ahmet
• Shahzad, Wajiha
• Shakerian, Shahrad
• Shakor, Pshtiwan
• Shan, Ming
• Shao, Shiting
• Sharifi, Seyed Mohammad Hossein
• Sharston, Ryan
• Shayan, Shadi
• Shehzad, Hafiz Muhammad Faisal
• Shen, Shui-Long
• Shenoy, Dinesh
• Shi, Xiaobo
• Shimbo, Lucia
• Shoar, Shahab
• Shofoluwe, Musibau
• Shrestha, Asheem
• Shrestha, Pramen
• Simeone, Davide
• Sing, Michael C. P.
• Singh, Devendra
• Singh, Ekta
• Singh, Mahender
• Singla, Harish
• Sinoh, Saznizam
• Siu, Ming Fung Francis
• Smith, Simon
• Smyth, Hedley
• Soares Piccoli, Marcella
• Soe Win, Ei Ei
• Soibelman, Lucio
• Sollazzo, Giuseppe
• Solomon, Oyebisi
• Soltanmohammadlou, Nazi
• Song, Jinbo
• Song, Ziyang
• Sorooshnia, Ehsan
• Ssegawa, Joseph
• Stevic, Zeljko
• Subiyanto, Effnu
• Sukkari, Lilana
• Sultan, Basel
• Sun, Chenjunyan
• Sun, Daxin
• Sun, Jun
• Sun, Ming
• Sunindijo, Riza
• Sze Nga, Yiu
• Tabatabaee, Sanaz
• Tai, Shuangliang
• Takim, Roshana
• Talebi, Saeed
• Tang, Xiaoying
• Tanko, Bruno
• Tao, Yao
• Tariq, Salman
• Tawalare, Abhay
• Tayade, Suhas
• Tehami, Mohamed
• Teizer, Johen
• Tembo, Chipozya
• Teng, Yue
• Tengan, Callistus
• Tennakoon, Gihan
• Tennakoon, Maheshi
• Terje Kalsaas, Bo
• Tezel, Algan
• Thneibat, Mujahed
• Thomas, Albert
• Thorpe, David
• Thuc, Le Dinh
• Tighnavard, Ali
• Ting-Yi, Chiang
• To, Wai Ming
• Tobin, Ndibarafinia
• Tokdemir, Onur
• Tokede, Olubukola
• Tonetto, Mirela
• Tookey, John
• Toosi, Hossein
• Tran, Dai
• Tripathi, Bhavna
• Tsang, Yip Kwong
• Tsao, Cynthia
• Tzortzopoulos, Patricia
• Uddin, S. M. Jamil
• Ugulu, Rex
• Umar, Tariq
• Umer, Muhammad
• Urbani, Michele
• Utama, Wahyudi
• Vahdatmanesh , Mohammad
• Vahdatmanesh, Mohammad
• Varghese, Koshy
• Vázquez-Vázquez, Miguel
• Veisi, Omid
• Viles, Elisabeth
• Voordijk, Hans
• Vrijhoef, Ruben
• Wahrhaftig, Alexandre
• Wakefield, Ron
• Walker, Derek
• Wandahl, Søren
• Wang, Cynthia
• Wang, Ge
• Wang, Jun
• Wang, Kun
• Wang, Liang
• Wang, Linzhuo
• Wang, Mudan
• Wang, Peipei
• Wang, Qi
• Wang, Tao
• Wang, Ting
• Wang, Yang
• Wang, Yingying
• Wang, Yuhe
• Wang, Zeyu
• Wang, Zhixiu
• Warid, Osama
• Wen, Jing
• Whyte, Jennifer
• Wibowo, Andreas
• Wijewickrama, Chamitha
• Wimalaratne, P.L.I.
• Windapo, Abimbola
• Wium, Jan
• Wong, Peter S. P.
• Wong, Sing Sing
• Wu, Chengke
• Wu, Chunlin
• Wu, Guangdong
• Wu, Han
• Wu, Liupengfei
• Wu, Lufeng
• Wu, Peng
• Wu, Song
• Wu, Xueying
• Wu, Zhijiang
• Wuni, Ibrahim Yahaya
• Xia, Bo
• Xiahou, Xiaer
• Xiao, Hong
• Xie, Haiyan
• Xie, Yong
• Xu, Bo
• Xu, Jiuping
• Xu, Sheng
• Xu, Yiye
• Xu, Yongshun
• Xu, Zhao
• Xue, Bin
• Xue, Fan
• Yadav, Gunjan
• Yaman, Siti Khalijah
• Yan, Ling
• Yan, Peng
• Yan, Xiaoli
• Yan, Xue
• Yang, Fan
• Yang, Jinkook
• Yang, Juneseok
• Yang, Jyh-Bin
• Yang, Lin
• Yang, Rebecca
• Yang, Wei
• Yao, Hongjiang
• Yap, Jeffrey
• Ye, Meng
• Yevu, Sitsofe
• Yi, Wen
• Yi, Xin
• Ying, Fei
• Yılmaz, Fatih
• Yomoah, Roland
• Younis, Ghada
• Yu, Gang
• Yu, Jingyu
• Yu, Miao
• Yuan, Jingfeng
• Yuan, Mengqi
• Yuan, Xiao
• Yue, Gaoyu
• Yung, Ping
• Zaghwan, Ashraf
• Zainuddin, Mairizal
• Zakariyyah, Kudirat
• Zakka, Wyom
• Zaky, Abdallah
• Zaman, Atiq
• Zavvari, Azam
• Zeng, Ningshuang
• Zeng, Ningshuang
• Zeng, Ruochen
• Zhai, Wujuan
• Zhang, Chengyi
• Zhang, Jingxiao
• Zhang, Lei
• Zhang, Lianying
• Zhang, Lihan
• Zhang, Limao
• Zhang, Qian
• Zhang, Qing-Wen
• Zhang, Rita Peihua
• Zhang, Ruixue
• Zhang, Shang
• Zhang, Wei
• Zhang, Xueqing (Eric)
• Zhang, Yongcheng
• Zhang, Yuanxin
• Zhang, Yuxuan
• Zhang, Zhe
• Zhang, Zhiyue
• Zhang, Ziyao
• Zhao, Dong
• Zhao, Guochao
• Zhao, Jianfeng
• Zhao, Nan
• Zhao, Xianbo
• Zhao, Xiaojing
• Zhao, Ying
• Zhao, Zihao
• Zheng, Chuanjun
• Zheng, Xian
• Zhiwu, Zhou
• Zhong, Botao
• Zhong, Jo
• Zhou, Fang
• Zhou, Shenghua
• Zhou, Zhipeng
• Zhu, Jianbo
• Zhu, Liuying
• Zohrehvandi, Shakib
• Zolkafli Zulkifly, Umi Kalsum
• Zou, Xin
• Zulu, Ephraim
• Zuo, Jian
• Zuo, Weiwei