Peer review is the driving force of journal development, and reviewers are gatekeepers who ensure that J 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 22 days and the median time to publication was 48.5 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:
| Abdul-Sater, Ali | Legg, Lynn |
| Adamczyk, Greta | Mallik, Saurav |
| Aguilar-Toala, Jose E. | McClure, Scott |
| Arcuri, Sabrina | Melo-Carrillo, Agustin |
| Bang, Sangsu | Meneses, Eloy López |
| Barnett, Austen | Moriyama, Yuuta |
| Bates, Vincent | Murphy, Jim |
| Bischof, Johanna | Musy, Marjorie |
| Bover Manderski, Michelle T. | Nakamura, Yoki |
| Cagliero, Cecilia Lucia | Nifli, Artemissia-Phoebe |
| Cambron, Christopher | Nogales-Bueno, Julio |
| Cavallo, Filippo | Noguera, Manuel |
| Cerea, Matteo | Novelskaitė, Aurelija |
| Chaganti, Subba Rao | Oludemi, Taofiq |
| Chi, Ting | Ordabayeva, Nailya |
| Chiaraluce, Franco | Osooli, Mehdi |
| Coppola, Gianluca | Osório, António José |
| D’Archivio, Angelo Antonio | Pérez-Foguet, Agustí |
| Dieleman, J. A. | Raina, Komal |
| Dixit, Fuhar | Rezaei, Mahdi |
| Doulos, Lambros T. | Roy, Indrani |
| Fantazy, Kamel | Rybnikova, Nataliya A. |
| Fowler, Jie G. | Saggioro, Fabio |
| Garcia, Eva Martinez | Sameti, Mohammad |
| Garcia-Ayllon, Salvador | Schroeter, Ronald |
| Gazda, Piotr | Severi, Mirko |
| Gómez-Urquiza, Jose L. | Shaw, Robert |
| Gugushvili, Alexi | Shen, Cheng |
| Hu, Xue Feng | Skoric, Marko M. |
| Hudişteanu, Valeriu Sebastian | Sokolov, Oleg |
| Inoue, Takeshi | Squadrito, Mario Leonardo |
| James, Christine A. | Talà, Adelfia |
| Janowski, Andrzej | Tongaonkar, Prasad C. |
| Jiang, Chang-Yu | Velasco-Quesada, Guillermo |
| Johnson, Kate | Vingo, Paolo De |
| Kadir, Mohammad Fahim | Wang, Mian |
| Kim, Dongyeop | Wimmer, Isabella |
| Kowalczewski, Przemysław Łukasz | Yu, Haitao |
| Kowalski, Radosław | Zamorska, Justyna |
| Kumar, Asit |
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