The editorial team greatly appreciates the reviewers who have dedicated their considerable time and expertise to the journal’s rigorous editorial process over the past 12 months, regardless of whether the papers are finally published or not. In 2019, a total of 75 papers were published in the journal, with a median time to first decision of 15 days and a median time from submission to publication of 43 days. The editors would like to express their sincere gratitude to the following reviewers for their generous contribution in 2019:
| Adly, Amr | Miller, Jay |
| Ainla, Alar | Minav, Tatiana |
| Al-Ibadi, Alaa | Mirvakili, Seyed M. |
| Amedeo, Amoresano | Mishra, Anand |
| Andrikopoulos, George | Mitterhofer, Hubert |
| Antonelli, Michele Gabrio | Mizzi, Luke |
| Barrett-Gonzalez, Ronald | Moosavian, Amin |
| Beckerle, Philipp | Must, Indrek |
| Bhounsule, Pranav A. | Mystkowski, Arkadiusz |
| Bieniek, Tomasz | Nakano, Kimihiko |
| Bishay, Peter | Nishioka, Yasutaka |
| Boldini, Alain | Olivieri, Lorenzo |
| Bompos, Dimitrios | Ostasevicius, Vytautas |
| Bonfitto, Angelo | Pai, Kedar |
| Botta, Fabio | Paoletti, Paolo |
| Byrtus, Miroslav | Payrebrune, Kristin |
| Cao, Qingjie | Peiner, Erwin |
| Cerruti, Pierfrancesco | Pesch, Alexander H. |
| Chen, Yuan-Tsung | Pio Belfiore, Nicola |
| Chiatto, Matteo | Plott, Jeff |
| Cicchi, Stefano | Polajžer, Boštjan |
| Cinefra, Maria | Poltschak, Florian |
| Čiplys, Daumantas | Rakotondrabe, Micky |
| Ciuprina, Gabriela | Ranzani, Tommaso |
| Cohn, Robert W. | Romanchik Kriuchkova, Eugenio |
| D'Auria, Daniela | Rosendo, Andre |
| Di Natali, Christian | Roßmanith, Hans |
| Diez-Jimenez, Efren | Roveda, Loris |
| Dindorf, Ryszard | Rubio, Jose De Jesus |
| Djeziri, Mohand Arab | Ryndzionek, Roland |
| Do, Thanh Nho | Sadrfaridpour, Behzad |
| Dohnal, Fadi | Sanchez-Rojas, Jose Luis |
| Duggen, Lars | Scalet, Giulia |
| Dulf, Eva H. | Schmidt, Lasse |
| Durante, Francesco | Sekine, Masashi |
| Esfahani, Ehsan | Sextro, Walter |
| Fan, Kangqi | Shintake, Jun |
| Fei, Tong | Silva, Alejandro |
| Felpin, François-Xavier | Sitko, Dorota |
| Fontana, Marco | Šittner, Petr |
| Fujii, Kozo | Slesarenko, Viacheslav |
| Garcia, Angel Pontin | Soares Dos Santos, Marco Paulo |
| Gaviria López, Alberto | Solomon, Virgil |
| Geier, Sebastian M. | Stalbaum, Tyler Paul |
| Ghosh, Arijit | Stepanov, Gennady V. |
| Greco, Carlo Salvatore | Sun, Yanhua |
| Grioli, Giorgio | Sun, Yun-Ping |
| Habib, Anowarul | Supancic, Peter |
| Hajžman, Michal | Suslov, Sergey |
| Hamza, Khan | Szewczyk, Roman |
| Han, Lei | Tabib-Azar, Massood |
| Hao, Guangbo | Tamagawa, Hirohisa |
| Harnett, Cindy | Tang, Wei |
| He, Qingsong | Tecpoyotl-Torres, Margarita |
| Holland, Donal | Tonoli, Andrea |
| Hošovský, Alexander | Tornabene, Francesco |
| Huang, Shyh-Chour | Tornari, Vivi |
| Huang, Sunan | Turkyilmaz, Serol |
| Huang, Weimin | Ursu, Ioan |
| Jackson, Nathan | Vaida, Calin |
| Jafferis, Noah T. | Verotti, Matteo |
| Kamamichi, Norihiro | Verstraten, Tom |
| Kang, Rongjie | Vilas, José Luís |
| Kanno, Takahiro | Voicu, Rodica |
| Keogh, Patrick | Waindok, Andrzej |
| Khan, Anzar | Wang, Huiming |
| Kim, Dae Won | Wang, Jiangxin |
| Kim, Hwa Young | Wang, Lifeng |
| Kitayama, Fumiya | Warczek, Jan |
| Koh, Je-sung | Weber, Felix |
| Komori, Mochimitsu | Wiens, Travis |
| Kurlyandskaya, Galina V. | Winkler, Anja |
| Kuznetsova, E Iren | Winter, Benjamin D. |
| Lamkin-Kennard, Kathleen | Witczak, Pawel |
| Lanceros-Mendez, Senentxu | Wu, Huachun |
| Lavoie, Philippe | Wu, Nan |
| Leinonen, Mikko | Xiang, Chaoqun |
| Lenzo, Basilio | Xie, Huikai |
| Levi, Alessandro | Xu, Yong |
| Li, Zhengwei | Xu, Zhenlong |
| Liang, Jun-Rui | Yang, Guanghong |
| Liu, Jun | Yang, Zhengbao |
| Liu, Tzong-shi | Yapici, Murat Kaya |
| Liu, Yen-Chen | Yeh, Chun-Liang |
| Liu, Yingxiang | Zhao, Huichan |
| Manfredi, Luigi | Zheng, Jianguo |
| Martínez-Pañeda, Emilio | Zhou, Yufeng |
| Maslen, Eric | Zhu, Minmin |
| Matsuura, Daisuke | Zimmerman, William |
| Meeker, David | Ziolkowski, Marek |
| Mekala, Rao Narasimha | Zolfagharian, Ali |
| Merola, Alessio | Zywica, Grzegorz |
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