参考文献:
ABBOTT LABORATORIES GOMTSYAN, Arthur R. VOIGHT, Eric A. BAYBURT, Erol K. CHEN, Jun DAANEN, Jerome F. DIDOMENICO, JR., Stanley KORT, Michael E. KYM, Philip R. MCDONALD, Heath A. PERNER, Richard J. SCHMIDT, Robert G. Patent: WO1/4541 A1, 1 Location in patent: Page/Page column 6-6 WO 1/4541 A1