A pioneer in scholarly, open access publishing, Multidisciplinary Digital Publishing Institute (MDPI) has supported academic communities since 1996. Based in Basel, Switzerland, MDPI has the mission to foster open scientific exchange in all forms, across all disciplines. Our 539 diverse and open access journals, including 530 peer-reviewed journals and 9 conference journals, are supported by more than 295,000 academic experts who share our mission, values, and commitment to providing high-quality service for our authors. We serve scholars from around the world to ensure the latest research is freely available and all content is distributed under a Creative Commons Attribution License (CC BY). MDPI's portfolio comprises at least 330 journals with impact factors, 70% of which are ranked in the top 2 quartiles of their respective fields. To view the current impact factors for MDPI journals (according to the Journal Citation Reports), please visit the journal list. With additional offices in Beijing, Wuhan, Tianjin and Nanjing (China), Philadelphia (USA), Barcelona (Spain), Belgrade and Novi Sad (Serbia), Manchester (UK), Tokyo (Japan), Cluj and Bucharest (Romania), Toronto (Canada), Kraków (Poland), Singapore (Singapore), Bangkok (Thailand) and Seoul (Republic of Korea), MDPI has published research by more than 4.6 million individual authors, and our journals receive around 1.9 billion article-level requests each year.