1. GE Healthcare Austria GmbH , Tiefenbach 15, 4871 Zipf , Austria
2. Software Competence Center Hagenberg GmbH (SCCH) , Softwarepark 32a, 4232 Hagenberg , Austria
3. Department of Mathematics, University of the Basque Country (UPV/EHU) , Leioa 48940 , Spain
4. Basque Center for Applied Mathematics, (BCAM) , 48009 Bilbao , Spain
5. Ikerbasque (Basque Foundation for Sciences) , 48009 Bilbao , Spain