1 Department of Internal Medicine, Second Faculty of Medicine, Charles University, Prague, Czech Republic. Electronic address: zorb@seznam.cz.
2 Institute of Computer Science of the ASCR, v. v. i., Czech Republic; Czech Institute of Informatics, Robotics, and Cybernetics, Czech Technical University in Prague, Czech Republic.
3 Department of Internal Medicine, Second Faculty of Medicine, Charles University, Prague, Czech Republic.