Wim Van Biesen1, Raymond Vanholder2. 1. Chair of European Renal Best Practice (ERBP) Group Ghent University Hospital Ghent, Belgium Hyponatraemia Guideline Development Group Chair of European Renal Best Practice (ERBP) Group Ghent University Hospital Ghent, Belgium Hyponatraemia Guideline Development Group eje@bioscientifica.com. 2. Chair of European Renal Best Practice (ERBP) Group Ghent University Hospital Ghent, Belgium Hyponatraemia Guideline Development Group Chair of European Renal Best Practice (ERBP) Group Ghent University Hospital Ghent, Belgium Hyponatraemia Guideline Development Group.