title: Where is the gap?
authors.affiliation: Division of Nephrology, University Hospital Zurich, Zurich, Switzerland.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Riethmüller
authors.affiliation: Experimental and Clinical Research Center, Max-Delbrück-Center for Molecular Medicine, Berlin, Germany.
authors.forename: Friedrich C
authors.initials: FC
authors.lastname: Luft
authors.affiliation: Division of Nephrology, University Hospital Zurich, Zurich, Switzerland.
authors.forename: Nilufar
authors.initials: N
authors.lastname: Mohebbi
keywords: anion gap; ion-specific electrodes; metabolic acidosis; salicylate