1. Interdisciplinary Centre for Computational Modelling, University of Rzeszów, Pigonia 1, 35-310 Rzeszów, Poland. bazan@ur.edu.pl
2. II Department of Internal Medicine, Jagiellonian University Medical College, Skawinska 8, 31-066 Krakow, Poland. mmsocha@cyf-kr.edu.pl
3. Interdisciplinary Centre for Computational Modelling, University of Rzeszów, Pigonia 1, 35-310 Rzeszów, Poland. sczuma@ur.edu.pl
4. Interdisciplinary Centre for Computational Modelling, University of Rzeszów, Pigonia 1, 35-310 Rzeszów, Poland. ldydo@ur.edu.pl
5. Interdisciplinary Centre for Computational Modelling, University of Rzeszów, Pigonia 1, 35-310 Rzeszów, Poland. wrzasa@ur.edu.pl
6. Institute of Mathematics, University of Warsaw, Banacha 2, 02-097 Warsaw, Poland, and Systems Research Institute, Polish Academy of Sciences, Newelska 6, 01�447 Warsaw, Poland. skowron@mimuw.edu.pl