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 61 papers were published in the journal, with a median time to first decision of 20 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:
| Abete, Maria Cesarina | Gu, Yuwei | Pereira, Maria De Lourdes |
| Alexiou, Christoph | Guo, Jingshu | Perkins, Edward |
| Andrade, Vanda Maria | Hanaka, Agnieszka | Petrović, Emina Kristina |
| Anticó, Enriqueta | Hartmann, Christina | Phillips, David |
| Antunes Dos Santos, Alessandra | Heinbockel, Thomas | Polen, Terry |
| Avino, Pasquale | Hellebust, Stig | Pulster, Erin |
| Barrasso, Roberta | Heuss-Aßbichler, Soraya | Quintaneiro Antunes, Carla Patrícia |
| Barreca, Salvatore | Hiki, Kyoshiro | Rajpurohit, Surendra |
| Basu, Ashis | Hill, Craig L. | Raval, Manmeet |
| Belaidi, Abdel Ali | Himeno, Seiichiro | Renieri, Elisavet A. |
| Bischoff, Karyn | Hood, Darryl B. | Rezania, Shahabaldin |
| Biziuk, Marek | Horiguchi, Hyogo | Riar, Amanjot Kaur |
| Block, Anna | Hseu, Zeng-Yei | Ribalta, Carla |
| Bodin, Johanna | Hsiao, Chung-Der | Ribeiro, Claudia |
| Bøhn, Thomas | Huang, Guannan | Ribeiro, Edna |
| Borrego, Ana Arias | Hudda, Neelakshi | Rice, Robert H. |
| Branco, Vasco | Im, Jeongdae | Rider, Cynthia |
| Brunelli, Elvira | Islamoglu, Timur | Rietra, Rene |
| Bu, Kaixuan | Jarosz-Krzemińska, Elżbieta | Rocio-Bautista, Priscilla |
| Buha, Aleksandra | Jelonek, Katarzyna | Rodríguez-Seijo, Andrés |
| Bus, James S. | Jeong, Jinyoung | Romanov, Victor |
| Busch, Hauke | Johansson, Ann-Christine | Rubino, Federico Maria |
| Cabral-Pinto, Marina M. S. | Juneau, Philippe | Russo, Mario Vincenzo |
| Calha, Isabel | Katsuta, Shoichi | Sabbioni, Gabriele |
| Calliera, Maura | Kemp, Michael G. | Sager, Manfred |
| Cao, Yang | Kobayashi, Yayoi | Sahu, Saura C. |
| Caron, Nathalie | Kosicka, Katarzyna | Salanţă, Liana Claudia |
| Certal, Ana Catarina | Krzyżak, Jacek | Samburova, Vera |
| Chan, Clement | Kubica, Paweł | Sams, Craig |
| Chapman, David | Kuča, Kamil | Sanches Silva, Ana |
| Chernyak, Sergei | Kudłak, Błażej | Sanchez-Hernandez, Juan |
| Chettle, David | Kumar, Manish | Satriano, Cristina |
| Chung, Shan-Shan | Kyrtopoulos, Soterios | Schadt, Simone |
| Ciulu, Marco | Ladeira, Carina | Schaefer, Matthias |
| Cohen, Dan | Lai, Yu-Heng | Schöpfer, Jutta |
| Colosio, Claudio | Lansman, Jeffry B. | Schreinemachers, Dina |
| Creton, Stuart | Lau, Vivian | Sertić, Miranda |
| Da Costa, João Pinto | Lavado, Ramon | Seth, Ratanesh |
| Darvell, Brian | Lavkulich, Les M. | Sikazwe, Donald |
| De Mieri, Maria | Lee, Jin-Yong | Silke, Bernard |
| Deb, Subrata | Lewińska, Karolina | Siniscalco, Dario |
| Demeilliers, Christine | Li, Ying | Slyvka, Yuriy |
| Deth, Richard | Löytönen, Markku | Sogorb Sánchez, Miguel Ángel |
| Devillers, James | Luckenbach, Till | Sone, Hideko |
| Distel, Martin | Macirella, Rachele | Stoll, Raphael |
| Domínguez Rebolledo, Álvaro Efrén | Mahmud, Basri | Suliman, Hagir B |
| Don, Aakash Welgamage | Malave-Llamas, Karlo | Suter, Marc J.-F. |
| Draheim, Roger R. | Mancini, Francesca Romana | Szpyrka, Ewa |
| Eckroat, Todd | Markowicz-Piasecka, Magdalena | Szyszkowicz, Mieczyslaw |
| Edwards, Joshua | Mason, Howard | Thevenod, Frank |
| Elnahhas, Toqa | Mcmorrow, Tara | Thoene, Michael |
| Eric, R. Gross | Medunic, Gordana | Torres, Adrian Gabriel |
| Erythropel, Hanno | Mendis, Hajeewaka | Tóth, Gergő |
| Espinoza-Derout, Jorge | Mikhlin, Yuri | Uboldi, Chiara |
| Etxebarria, N. | Miller, Gary W. | Ungurianu, Anca |
| Evans, Marlene | Milosavljević, Milutin M. | Valcke, Mathieu |
| Evens, Anne | Mitra, Kaushik | Vance, Terrence |
| Fantacuzzi, Marialuigia | Moretto, Angelo | Velíšek, Josef |
| Fay, Michael J. | Motta, Chiara Maria | Vesey, David |
| Félix, Luis | Nair, Vimal | Vidal, Tânia |
| Fernandez, Marina O. | Nakai, Kunihiko | Viitanen, Anna-Kaisa |
| Filippini, Tommaso | Neuberger, Manfred | Villalta, Peter |
| Fu, Xiao-An | Niemann, Lars | Walton, AnnMarie L. |
| Gamet-Payrastre, Laurence | Obermair, Gerald | Wang, Ping |
| Ganapathy, Vengatesh | Okuda, Kazuhide | Wang, Teresa W. |
| Gardner, Paul D. | Oliver, Brian | Wetmore, Stacey |
| Gauthier, Patrick T. | Orecchio, Santino | Wickliffe, Jeffrey |
| Ghosh, Monoj | Owsianiak, Mikołaj | Wijayawardena, Ayanka |
| Goldoni, Matteo | Panderi, Irene | Woelwer-Rieck, Ursula |
| Golmohamadi, Amir | Pannetier, Pauline | Xu, Wenyan |
| González, Aridane G. | Pappas, Richard Steven | Yao, Zhong-Ping |
| Gorini, Francesca | Patyra, Ewelina | Zaharia, Carmen |
| Green, Don | Peace, Michelle | Zeiner, Michaela |
| Grisoni, Francesca | Peluso, Marco E. M. | Zhang, Haofei |
| Grollman, Arthur P. | Peña-Fernández, Antonio | Zhu, Junjie |
| Gruszecka, Agnieszka | Penttinen, Olli-Pekka |
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