Kai Lauri1, Jürgen Arund1, Jana Holmar1, Risto Tanner1,2, Merike Luman3 and Ivo Fridolin1

*1Department of Biomedical Engineering, Technomedicum, Tallinn University of Technology, 2Laboratory of Chemical Physics, National Institute of Chemical Physics and Biophysics, 3Department of Dialysis and Nephrology, North Estonia Medical Centre, Estonia* 
