参考文献:
UNIVERSITY HEALTH NETWORK SAMPSON, Peter Brent LIU, Yong LI, Sze-Wan FORREST, Bryan T. PAULS, Heinz W. EDWARDS, Louise G. FEHER, Miklos PATEL, Narendra Kumar B. LAUFER, Radoslaw PAN, Guohua Patent: WO0/3946 A, 0 Location in patent: Page/Page column 3