参考文献:
GENZYME CORPORATION PRESIDENT AND FELLOWS OF HARVARD COLLEGE MASSACHUSETTS INSTITUTE OF TECHNOLOGY MAZITSCHEK, Ralph CLARDY, Jon, C. WIRTH, Dyann WIEGAND, Roger URGAONKAR, Sameer BANIECKI, Mary, Lynn CORTESE, Joseph CELATKA, Cassandra XIANG, Yibin SKERLJ, Renato BOURQUE, Elyse, M.j. Patent: WO/53697 A, Location in patent: Page/Page column 87-88