[1] Univ Debrecen, Med & Hlth Sci Ctr, Fac Med, Dept Internal Med 1,Div Nephrol, H-4012 Debrecen, Hungary
[2] Fresenius Med Care, Ctr Nephrol, H-3526 Miskolc, Hungary
[3] Univ Debrecen, Med & Hlth Sci Ctr, Fac Med, Inst Surg,Ctr Transplantat, H-4012 Debrecen, Hungary
[4] Eotvos Lorand Univ, Fac Social Sci, Inst Econ, Dept Hlth Policy & Hlth Econ, H-1117 Budapest, Hungary