1. Division of Medical Informatics, Department of Biomedical Engineering, Linköping University, 581 83 Linköping, Sweden
2. Center for Medical Image Science and Visualization (CMIV), Linköping University, 581 83 Linköping, Sweden
3. Division of Statistics and Machine Learning, Department of Computer and Information Science, Linköping University, 581 83 Linköping, Sweden