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 44 papers were published in the journal, with a median time to first decision of 20.66 days and a median time from submission to publication of 47.5 days. The editors would like to express their sincere gratitude to the following reviewers for their generous contribution in 2019:
| Abdelraheem, Wael | Mihelič, Rok |
| Afshar, Arash | Mizera, Ales |
| Aguilar, Alfredo | Mogawer, Walaa |
| Aldrian, Alexia | Mohajerani, Abbas |
| Araya-Hermosilla, Rodrigo | Mojica, Jesus Isaac Minchaca |
| Avolio, Roberto | Molina-Moreno, Valentín |
| Azizi, Sohrab | Monti, Marco |
| Baldo, Nicola | Moratti, Stephen C |
| Barreca, Francesco | Morrell, Jeff |
| Belbase, Shashidhar | Morrison, Gregory M. |
| Bentes, Isabel | Morrissey, Anne |
| Bernardo, Enrico | Nara, Satya |
| Bilska, Beata | Navarro, Francisco Javier |
| Blais, Jean-François | Núñez-Cacho Utrilla, Pedro |
| Bonollo, Franco | Ogra, Aurobindo |
| Brambilla, Massimo | Ojeda-Benitez, Sara |
| Bufoni, André | Oke, Adekunle |
| Ciani, Adriano | Pandini, Stefano |
| Coca Sanz, Mónica | Paolini, Valerio |
| Cong, Liang | Pérez Calvo, José Francisco |
| Corder, Glen | Petrović, Marija |
| Corsini, Filippo | Pingitore, Nicholas |
| Cronin, Aidan | Poletto, Matheus |
| Czarnecka-Komorowska, Dorota | Poponi, Stefano |
| Del Pero, Francesco | Pouranian, M. Reza |
| Della Spina, Lucia | Rampedi, Isaac |
| Didenko, Nikolay I. | Reimer, Maximilian V. |
| Dodescu, Anca Otilia | Restrepo Baena, Oscar Jaime |
| Donatello, Shane | Roffeis, Martin |
| Edokpayi, Joshua Nosa | Rogerio Pinheiro, Plácido |
| Farina, Ilenia | Ruffino, Barbara |
| Fernández González, Daniel | Ruiz-Real, Jose Luis |
| Fernández-García, Marta | Salinas-Rodríguez, Eleazar |
| Ferrari, Chiara | Santos, José Carlos Oliveira |
| Ferronato, Navarro | Serbanoiu, Adrian Alexandru |
| Formela, Krzysztof | Šerelis, Evaldas |
| García-Alcaraz, Jorge Luis | Shaikh, Faiz U. A. |
| Ghabchi, Rouzbeh | Shaw, Pete |
| Gharehveran, Mahsa Modiri | Shin, Kyung Joon |
| Gmurek, Marta | Shirai, Masayuki |
| Gonçalves, David | Shrivastava, Sandeep |
| Guimarães, Claudinei De Souza | Silva, Rogério Diogne De Souza E |
| Hamad, Kotiba | Silva-Afonso, Armando |
| He, Wenhan | Simic, Vladimir |
| Hejna, Aleksander | Sivakumar, Poopalasingam |
| Hossain, Md. Uzzal | Staicu, Teodora |
| Hyk, Wojciech | Szymańska, Magdalena |
| Iclodean, Calin | Tahami, Seyed Amid |
| Isbrandt, Marek | Tarrés, Quim |
| Iulo, Lisa | Tijing, Leonard |
| Jin, Jing | Tilley, Elizabeth |
| Kamberović, Željko | Tonjes, David |
| Kanari, Ndue | Trybuła, Zbigniew |
| Kano, Naoki | Tudor, Terry |
| Ko, Ming-Sheng | Tun, Maw Maw |
| Kowalczuk, Przemyslaw | Turek, Anna |
| Król, Aleksander | Valentukevičienė, Marina |
| Kuciel, Stanisław | Veleva, Vesela |
| Kurda, Rawaz | Verlicchi, Paola |
| Kurdve, Martin | Vollprecht, Daniel |
| Kusano, Yukihiro | Vu, Hong |
| Lambert, Paul | Wang, Dongyi |
| Li, Shanshan | Wang, XiaoYong |
| Lin, Hsin-Tien | Wang, Yanshuai |
| López-Cuevas, J. | Wojewnik-Filipkowska, Anna |
| Ma, Andong | Wronka-Pośpiech, Martyna |
| Manca, Pier Paolo | Wu, Hwai-Chung |
| Mardani, Abbas | Yan, Yu |
| Marín-Genescà, Marc | Yano, Junya |
| Martin-Gamboa, Mario | Yao, Hui |
| Medellín-Castillo, Nahum | Zeng, Xianlai |
| Meyer-Kohlstock, Daniel | Zhao, Lingying |
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