1Manchester Institute of Nephrology and Transplantation, The Royal Infirmary, Manchester, UK
2Universitair Ziekenhuis Gasthuisberg, Leuven, Belgium
3Virga Jesse Ziekenhuis, Hasselt, Belgium
4KfH-Dialysezentrum, Berlin, Germany
5Freeman Hospital, Newcastle upon Tyne, UK
6Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
7Dialysezentrum Barmbek, Hamburg, Germany
8Imelda Ziekenhuis, Bonheiden, Belgium
9KfH-Dialysezentrum, Bottrop, Germany