Acknowledgment of Reviewers of Challenges in 2020

Peer review is the driving force of journal development, and reviewers are gatekeepers who ensure that Challenges maintains its standards for the high quality of its published papers. Thanks to the cooperation of our reviewers, in 2020, the median time to first decision was 19 days and the median time to publication was 38.5 days. The editors would like to express their sincere gratitude to the following reviewers for their precious time and dedication, regardless of whether the papers were finally published:

Adami, Renata	Karbowski, Adam
Ahmadinejad, Mitra	Kim, Hye-Mi
Amicucci, Antonella	Klöck, Carola
Angeloni, Giulia	Kozlinska, Inna
Ascencio-Vásquez, Julián	Kurppa, Sirpa
Badea, Dorel	Liu, Hailong
Baum, Seth	Lonsdale, Kate
Benaabidate, Lahcen	Maghsoudi, Tahereh
Benatar, Solly	MAK, Hugo Wai Leung
Bettoni, Marco	Matus, Patricia Isabel
Bharti, Vidhi	Medina-Ramírez, Iliana
Bishoge, Obadia	Mees, Heleen
Brabec, Jan	Michel, Florent
Bråtveit, Magne	Morkunas, Mangirdas
Brown, Mark	Naicker, Nisha
Bryant, Christopher	Najjar, Mohammad
Cai, Mengfan	Nam, Taewoo
Calevo, Jacopo	Nunes, Ana Raquel
Carpenter, Alexander	Onder, Mehmet
Castro-Colin, Miguel	Paszkiel, Szczepan
Cavallo, Aurora	Pisaturo, Giuseppe Roberto
Celli, Daniele	Privitera, Donatella
Chiang, Hsin-I	Redvers, Nicole
Cho, Sung-Hyoun	Roman, Michał
Demartini, Paola	Saldo, Jordi
Erhabor, Edobor Michael	Salvia, Rosanna
Estellés, Marta	Sarfraz, Muddassar
Fernández-Martínez, María Del Mar	Satarug, Soisungwan
Folmer, Britta	Siddiqui, Nadia
Francik, Slawomir	Siroux, Monica
Frodeman, Robert	Sriwastva, Mukesh Kumar
Gagliano, Monica	Sudol, Miroslaw
Ganzfried, Sam	Triviño-Tarradas, Paula
Gentili, Denis	Uşak, Muhammet
Giammarchi, Marco	Vinokurov, Sergey
Glibowski, Paweł	Wałdykowski, Piotr
Glowacz, Adam	Wang, Chuanyi
Gonçalves, Ângela	Wang, Gai-Ge
Guerrero, Francisco	Wartalska, Katarzyna
Haluza, Daniela	Webb, Darren
Hele, Karl	Wikman Svahn, Per
Hernandez-Escobedo, Quetzalcoatl	Wilson, Amanda
Herrera, Miguel Angel	Wu, Wei
Huang, Hung-Pin	Xu, Zhenzhen
Ivanov, Peter	Zakrzewska-Półtorak, Alicja
Jiménez-Fernández, Eduardo	Zamora-Polo, Francisco
Jose, Marco