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 0542; 0543; 0544; 0545; 0546; 0547 ;