Rigorous peer-review is the corner-stone of high-quality academic publishing. The editorial team greatly appreciates the reviewers who contributed their knowledge and expertise to the journal’s editorial process over the past 12 months. In 2018, a total of 56 papers were published in the journal, with a median time to first decision of 23 days and a median time to publication of 62.5 days. The editors would like to express their sincere gratitude to the following reviewers for their cooperation and dedication in 2018:
| Abete, Maria Cesarina | Martín-Alberca, Carlos |
| Alladio, Eugenio | Martins, Rui C. |
| Amigo-Benavent, Miryam | Mashima, Ryuichi |
| Anticó, Enriqueta | Matikonda, Siddharth |
| Baeza Baeza, Juan José | Miękus, Natalia |
| Bakry, Rania | Mirna, Habuda-Stanic |
| Barreca, Salvatore | Mitulovic, Goran |
| Berhow, Mark | Miyazato, Hironari |
| Blanchard, Peter E.R. | Mudalige, Thilak K. |
| Bonikowski, Radosław | Nam, Hyungseok |
| Bruno, Thomas J. | Nasiri, Rasoul |
| Burgio, Lucia | Nic Daeid, Niamh |
| Campíns-Falcó, Pilar | Nischang, Ivo |
| Carrero, Jose Antonio | Nthunya, Lebea N. |
| Chen, Hsin-Chun | Oliveira, Hugo M. |
| Cheng, Keding | Onchoke, Kefa |
| Coldea, Teodora | Palma, Miguel |
| Cologna, Stephanie | Panderi, Irene |
| Cosma, Pinalysa | Parpinello, Giuseppina |
| Dal Bello, Federica | Pazourek, Jiri |
| Del Hoyo, Carmen M. | Perepelyuk, Maryna |
| Destandeau, Emilie | Perestrelo, Rosa |
| Devasurendra, Amila | Perrault, Katelynn A. |
| Dichiara, Anthony | Philippe, Allan |
| Dinica, Rodica Mihaela | Picca, Rosaria Anna |
| Dolowy, Malgorzata | Pintado-Herrera, Marina |
| Douvris, Christos | Piriou, Yannick |
| Dunphy, Michael J. | Pohl, Pawel |
| Escudero, Carlos | Pollmann, Katrin |
| Esteve-Romero, Josep | Pozo, Óscar J. |
| Falconer, James | Prochaska, Charikleia |
| Galbács, Gábor | Prosen, Helena |
| Galván-D’Alessandro, Leandro | Protti, Michele |
| Gheju, Marius | Puton, Jarosław |
| Gilchrist, Elizabeth | Ramil, María |
| Gonçalves, Virginia | Ramos, Daniel |
| Gong, Maojun | Roby, Mohamed Hussein Hamdy |
| Griffiths, Peter | Rodriguez, Pilar |
| Grinias, James P. | Rosenberg, Erwin |
| Gumieniczek, Anna | Roy, Sagar |
| Gunschera, Jan | Ruiz-Aceituno, Laura |
| Heberger, Karoly | Saiano, Filippo |
| Herráez-Hernández, Rosa | Sarti, Elena |
| Hlozek, Tomas | Schepdael, Ann Van |
| Hopfer, Helene | Schwartz, Andrew J. |
| Iadarola, Paolo | Shin, Jae Sup |
| Ifelebuegu, Augustine | Skalicka-Woźniak, Krystyna |
| Jandera, Pavel | Snow, Nicholas |
| Järvenpää, Eila P. | Stefanuto, Pierre-Hugues |
| Jaumot, Joaquim | Sterba, Johannes H. |
| Kalíková, Kvӗta | Stürup, Stefan |
| Kataoka, Hiroyuki | Szumny, Antoni Jacek |
| Kim, Daehwan | Takahashi, Katsuyuki |
| Klarskov, Klaus | Torres-Padrón, M. Esther |
| Koel, Mihkel | Trögl, Josef |
| Kopel, Pavel | Troise, Antonio Dario |
| Korzeniowska, Margorzata | Tuzimski, Tomasz |
| Koziel, Jacek A. | Tyśkiewicz, Katarzyna |
| Kozliak, Evguenii I. | Urieta, José |
| Kulbacka, Julita | Valko, Klara |
| Kusch, Peter | Vázquez-Tato, M. Pilar |
| Laborda, Francisco | Verzera, Antonella |
| Lantes, Oscar | Viapiana, Agnieszka |
| Li, Ailin | Vila Verde, Giuliana M. |
| Liao, Shu-Chuan | Wahab, M. Farooq |
| Locatelli, Marcello | Walsh, Marie |
| Lopez-Linares, Francisco | Wätzig, Hermann |
| Lucena, Rafael | Willerth, Stephanie M. |
| Luna, Carlos | Witkiewicz, Zygfryd |
| Luo, Wentai | Woźniak, Łukasz |
| Maage, Amund | Yoza, Brandon A. |
| Madrid, Yolanda | Zajickova, Zuzana |
| Marta, Ferreiro-González | Zielińska-Pisklak, Monika A. |
© 2019 by the author. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).