[1] Charles Univ Prague, Dept Med, Fac Med 1, CZ-16902 Prague 6, Czech Republic
[2] Charles Univ Prague, Cent Mil Hosp, CZ-16902 Prague 6, Czech Republic
[3] Food Res Inst, Dept Nutrit Subst, Prague, Czech Republic
[4] Charles Univ Prague, Dept Pediat, Fac Med 2, CZ-16902 Prague, Czech Republic
[5] Charles Univ Prague, Hosp Motol, CZ-16902 Prague, Czech Republic