title: In Reply.
authors.affiliation: Siemens Healthcare Diagnostics Products Marburg, Germany lenard.mueller@siemens.com.
authors.forename: Lenard
authors.initials: L
authors.lastname: Mueller
authors.affiliation: Siemens Healthcare Diagnostics Products Marburg, Germany.
authors.forename: Claus
authors.initials: C
authors.lastname: Pruemper
mesh_terms: D055316:Cystatin C / Q000097:blood*; D005919:Glomerular Filtration Rate; D006801:Humans; D007753:Laboratories / Q000592:standards*; D051436:Renal Insufficiency, Chronic / Q000175:diagnosis*
chemical_list: D055316:Cystatin C