Today, I submitted my doctoral dissertation. It is based on my research outcomes in the Department of Computer Science, Aalto University. It studies deep learning-based natural language processing for healthcare, focusing on clinical text representation, multitask learning, and data-driven applications.

At the time of completing this dissertation, I would like to thank my supervisor for his patient and helpful guidance, my colleagues in the research group for kind peer support, colleagues from the Science-IT team for helping me with scientific computing, many other Aalto colleagues for helping me in my academic development, Aalto students, whom I had pleasant research experience with, through the Aalto CS courses and thesis projects, and the Aalto occupational healthcare team. During my doctoral candidate, I conducted visiting or collaborative research in a couple of institutes, my special thanks go to my host supervisors and colleagues at the Finnish Institute for Health and Welfare (THL), HUS Helsinki University Hospital, and the Schütze Lab, Institute for Information and Language Processing, University of Munich.

During my candidature, it is my pleasure and honor to work with brilliant collaborators from different places worldwide. My deepest thanks go to every collaborator. I acknowledge the computational resources provided by the Aalto Science-IT project and CSC - IT Center for Science, Finland. I would like to thank the Nokia Foundation for granting the Nokia Scholarship to support my research and the ELISE Mobility Program, Finnish Center for Artificial Intelligence (FCAI), and Foundation for Aalto University Science and Technology for providing a travel grant to support my visiting research. Finally, I would like to thank my family and friends for their support in my PhD journey.