参考文献:
Vifor (International) AG Bark, Thomas Buhr, Wilm Burckhardt, Susanna Burgert, Michael Canclini, Camillo Dürrenberger, Franz Funk, Felix Geisser, Peter Kalogerakis, Aris Mayer, Simona Philipp, Erik Reim, Stefan Sieber, Diana Schmitt, Jörg Schwarz, Katrin Patent: US2013/109662 A1, 2013 Location in patent: Paragraph 0053 0054 0555 0556 0557