http://www.me.gatech.edu/faculty/ku.shtml Salubria (on sale cartilage substitute, PVA cryogel) PVA cryogel patent: Lecture note: http://www.me.gatech.edu/docs/Zeigler%2010a.pdf PVA cryogel patent for heart valves: http://www.wipo.int/pctdb/en/wo.jsp?WO=2007016097&IA=US2006028858&DISPLAY=STATUS First operation in UK: http://www.bio-vation.co.uk/salucartilage_uk_first.php