1. Department of Environmental Medicine, New York University School of Medicine, Tuxedo, NY, USA
2. Centre for Symmetry and Deformation, Department of Mathematical Sciences, University of Copenhagen, Copenhagen Ø, Denmark
3. Department of Biomedical Engineering, Duke University, Durham, NC, USA
4. Laboratory for Applied Statistics, Department of Mathematical Sciences, University of Copenhagen, Copenhagen Ø, Denmark
5. Department of Applied Mathematics and Computer Science, Technical University of Denmark, Kgs. Lyngby, Denmark