1 Department of Internal Medicine and Gerontology, Jagiellonian University Medical College, Kraków, Poland; University Hospital, Kraków, Poland.
2 University Hospital, Kraków, Poland.
3 Department of Internal Medicine and Gerontology, Jagiellonian University Medical College, Kraków, Poland; University Hospital, Kraków, Poland. Electronic address: jerzy.gasowski@uj.edu.pl.