Talk Title: Mathematical Modeling Approach for Health, Mini-Symposium on Mathematical Modeling & Systems Approaches in Health Sciences, International Forum for Mathematical Modeling (IFMM-2014), Organized by Research & Development Center for Mathematical Modeling, Department of Mathematics, University of Colombo and Department of Clinical Medicine, Faculty of Medicine, University of Colombo, in collaboration with University of Kaiserslautern, Germany and DAAD, March 18, 2014.