[1] UNIV LEIDEN HOSP, DEPT NEPHROL, NL-2300 RC LEIDEN, NETHERLANDS
[2] UNIV LEIDEN HOSP, DEPT GERIATR, NL-2300 RC LEIDEN, NETHERLANDS
[3] LEIDEN UNIV, DEPT PATHOL, LEIDEN, NETHERLANDS
[4] LEIDEN UNIV, DEPT NEPHROL, LEIDEN, NETHERLANDS
[5] LEIDEN UNIV, DEPT GERIATR, LEIDEN, NETHERLANDS
[6] EEMLAND HOSP LICTHTENBERG, DEPT INTERNAL MED, AMERSFOORT, NETHERLANDS
[7] KENNEMER GASTHUIS, DEPT INTERNAL MED, HAARLEM, NETHERLANDS