**Blood Volume Regulation**

Roland E. Winkler1, Fabio Grandi2 and Antonio Santoro3

*1Department Nephrology and Dialysis-PDA Rostock 2Gambro S.p.A. 3Department of Nephrology, Dialysis and Hypertension Policlinico S. Orsola-Malpighi 1Germany 2,3Italy* 
