[1] Charles Univ Prague, Dept Nephrol, Gen Teaching Hosp, Prague, Czech Republic
[2] Charles Univ Prague, Fac Med 1, Prague, Czech Republic
[3] Charles Univ Prague, Gen Teaching Hosp, Dept Clin Biochem & Lab Diagnost, Prague, Czech Republic
[4] Charles Univ Prague, Gen Teaching Hosp, Inst Microbiol & Immunol, Prague, Czech Republic