title: The authors reply.
authors.affiliation: Health Services Research Unit, Institute for Science and Technology in Medicine, Keele University, Newcastle-under-Lyme, UK.
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Davies
authors.affiliation: UCL Centre for Nephrology, Royal Free Hospital, University College London Medical School, London, UK.
authors.forename: Andrew
authors.initials: A
authors.lastname: Davenport
mesh_terms: D001834:Body Water; D006801:Humans; D010992:Plethysmography, Impedance / Q000379:methods*; D006435:Renal Dialysis