1. Center for Applied and Computational Mathematics, School of Mathematical Sciences, Rochester Institute of Technology, Rochester, NY, USA
2. Department of Biomedical Engineering, Kate Gleason College of Engineering, Rochester Institute of Technology, Rochester, NY, USA
3. Departamento de Matemática Aplicada, Universidad Nacional de Educación a Distancia, Madrid, Spain
4. Institute of Mathematics, Martin-Luther-University of Halle-Wittenberg, Halle-Saale, Germany