Machine learning approaches on health insurance data to classify cases related to care grades: first pilot studies - Berehi Zadeh, Raphael; Huang, Xinyu; Grzegorzek, Marcin; Witolla, Andreas (Student Conference Proceedings 2023: Medical Engineering Science, Medical Informatics, Biomedical Engineering, Auditory Technology, Biophysics and Robotics and Autonomous Systems, 2023)