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 108 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 40 days. The editors would like to express their sincere gratitude to the following reviewers for their generous contribution in 2019:
| Abdelkarim, Omar | Maciejewska, Magdalena |
| Aboudi, Jacob | Macoas, Ermelinda |
| Aleksander, Muc | Maio, Andrea |
| Al-Haik, Marwan | Mamane, Victor |
| Ali Ansari, Sajid | Mangalara, Jayachandra Hari |
| Altan, M. Cengiz | Martikka, Ossi |
| Aly, Karim | Martins Amaro, Ana Paula Betencourt |
| Amiri, Ali | Martone, Alfonso |
| Andrzejewski, Jacek | Mascolo, Maria Cristina |
| Annalisa, Natali Murri | Meenashisundaram, Ganesh Kumar |
| Asaee, Zohreh | Megiel, Elżbieta |
| Ashley, Jon | Meola, Carosena |
| Bahi, Addie | Minakshi, Manickam |
| Bai, Hongwei | Mishra, Rajesh |
| BAJPAI, ANKUR | Mishra, Sandeep K. |
| Barkoula, Nektaria-Marianthi | Mishra, Yogendra |
| Barreteau, Cyrille | Mizera, Ales |
| Barretta, Raffaele | Mohan, Velram Balaji |
| Barry, Carol | Montilla, Francisco |
| Beake, Ben | Morales-Rodríguez, Ana |
| Beard, James D. | Moumen, Ahmed El |
| Bella, Federico | Mucha, Maria |
| Belnoue, Jonathan | Muscio, Alberto |
| Bikiaris, Dimitrios | Nand, Ashveen |
| Blum, Wolfgang | Nanni, Francesca |
| Bocci, Edoardo | Naser, M. Z. |
| Brela, Mateusz | Navarro, Rodrigo |
| Brnić, Josip | Nieto, Andy |
| Brunner, Andreas | Odeshi, Akindele |
| Brzeska, Joanna | Oliver-Ortega, Helena |
| Caminero Torija, Miguel Ángel | Oromiehie, Ebrahim |
| Camino, Giovanni | Ortenzi, Marco A. |
| Cao, Jianyun | Osswald, Tim |
| Caporali, Stefano | Pagacz, Joanna |
| Carosio, Federico | Paleo Vieito, António Jose |
| Carrasco, Sergio | Pamies, Ramon |
| Cavallaro, Giuseppe | Papadopoulos, Antonios N. |
| Cech, Vladimir | Pappallettere, Carmine |
| Cesano, Federico | Park, Young-Bin |
| Chatterjee, Sudipta | Parmar, Kaushik |
| Chavoshi, Saeed Zare | Pawlak, Andrzej |
| Chen, Chunhui | Pegoretti, Alessandro |
| Chen, Jun | Pereira, Ruben |
| Chen, Shuo | Petrone, Giuseppe |
| Cho, Sunghun | Petrucci, Roberto |
| Choi, Heung Soap | Pham, Tung |
| Cicala, Gianluca | Pielichowski, Krzysztof |
| Cicero, Sergio | Pinkl, Stefan |
| Colombi, Pierluigi | Pogrebnjak, Alexander |
| Corrigan, Nathaniel | Polimeni, Antonella |
| Costantino, Ferdinando | Popescu, Vasilica |
| Cristea, Cecilia | Posadas, Pilar |
| Cruz, Sandra | Potter, Kevin |
| Dehghanghadikolaei, Amir | Qiang, Zhe |
| Del Barrio, Jesús | Qin, Yi |
| Deng, Shiguang | Quijada, César |
| DI, Chukov | Radtke, Aleksandra |
| Dolata, Anna | Ragab, Mohyeldin |
| Domenici, Valentina | Rebaioli, Lara |
| Dong, Chensong | Ribichini, Remo |
| D’Ottavio, Michele | Richtera, Lukáš |
| Du, Xusheng | Riess, Gisbert |
| Dul, Sithiprumnea | Robisson, Agathe |
| Dunky, Manfred | Rousakis, Theodoros |
| Eslami, Hossein | Rydz, Joanna |
| Fantuzzi, Nicholas | Rydzkowski, Tomasz |
| Fazzolari, Fiorenzo | Sacher, Edward |
| Feng, Chuang | Saimoto, Akihide |
| Fernandes, Fábio | Sakon, Takuo |
| Ferone, Claudio | Salas, Carlos |
| Focacci, Francesco | Samulionis, Vytautas |
| Forster, Aaron M. | Saravanan, Rajendran |
| Franchin, Giorgia | Seifitokaldani, Ali |
| Gao, Zhe | Seo, Young-Soo |
| García-Martínez, Jesús-María | Serenko, Olga |
| Gaska, Karolina | Sguazzo, Carmen |
| Gayner, Chhatrasal | Shalaby, Mohamed |
| Gereke, Thomas | Sharma, Priyanka |
| Gomes, Fernando | Shestakov, Mikhail |
| Gowripalan, Nadarajah | Shi, Wenbo |
| Grande Tovar, Carlos David | Shi, Xiaoyang |
| Gu, Yuwei | Shirvanimoghaddam, Kamyar |
| Gulizzi, Vincenzo | Simões, Sónia |
| Gunputh, Urvashi | Singh, Rajesh |
| Guo, Dezhou | Siracusa, Valentina |
| Gupta, Rishi | Sitarz, Maciej |
| HALLAL, Ali | Smarzewski, Piotr |
| Hanif, Asad | Sorrentino, Andrea |
| Hausmann, Joachim | Srinivasan, Gowrishankar |
| Haynes, Anthony | Stöckelhuber, Klaus Werner |
| Hegmann, Elda | Stylianakis, Minas M. |
| Heinz, Hendrik | Sun, Hao |
| Hergan, Patrick | Szala, Miroslaw |
| Hesp, Simon A.M. | Takahiro, Wada |
| Huang, Chih-Feng | Tan, Noel Peter Bengzon |
| Jampaiah, Deshetti | Tang, Jie |
| Jermakowicz-Bartkowiak, Dorota | Tehrani, Mehran |
| Jiang, Lai | Thrivikraman, Greeshma |
| Jopek, Hubert | Tian, He |
| Kadi, Nawar | Tian, Liang |
| Kang, Inpil | Torgal, F. Pacheco |
| Katogi, Hideaki | Torres Marques, Antonio |
| Kim, Nam Kyeun | Torres-Lagares, Daniel |
| Kim, Sang-Jae | Triantafillou, Thanasis |
| Kim, Wonho | Trzepiecinski, Tomasz |
| Kochmańska, Agnieszka | Tsioulou, Ourania |
| Kokado, Kenta | Umer, Rehan |
| Koncar, Vladan | Unterweger, Christoph |
| Koo, Hyung-Jun | Vahabi, Henri |
| Korzeniewska, Ewa | Vaiano, Vincenzo |
| Kotsuchibashi, Yohei | Van Herwijnen, Hendrik |
| Kulikov, Gennady | Vilaseca, Fabiola |
| Kumanek, Bogumiła | Wang, Fuke |
| Kuo, Pei-Yu | Wang, Lu |
| Lamuta, Caterina | Wang, Xiaoen |
| Lanzoni, Luca | Wang, Yeqing |
| Lavagna, Luca | Weber, Ludger |
| Lazzara, Giuseppe | Wieslawa, Nocun-Wczelik |
| Lebeau, Bénédicte | Winkler, Anja |
| Lebon, Frédéric | Wójcik, Grzegorz |
| Lee, Chul-Hee | Xia, Changlei |
| Lee, Jongbok | Xu, Shuozhi |
| Lee, Min Wook | Yan, Kai |
| Lee, Wonoh | Yang, An-Chih |
| Lekakou, Constantina | Yasin, Sohail |
| Lesiuk, Grzegorz | Yousefi, Nariman |
| Letcher, Todd | Yu, Hakki |
| Li, Jiehua | Yu, Jiayi |
| Li, Xinda | Yu, Rena C. |
| Li, Xue | Zabihi, Omid |
| Li, Yang | Zaharescu, Traian |
| Li, Zhengwei | Zhang, Bing |
| Liang, Tian | Zhang, Di |
| Lin, Chien-hong | Zhang, Hai |
| Linul, Emanoil | Zhang, Laichang |
| Lionetto, Francesca | Zhang, Meng |
| Liotier, Pierre-Jacques | Zhang, Xuefeng |
| Liu, Jinming | Zheng, Qiye |
| Lu, Yang | Zhou, Jin |
| Luciano, Raimondo | Żyła, Gaweł |
| Machado, Tenreiro |
© 2020 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/).