参考文献:
ABBOTT LABORATORIES CALDERWOOD, David, J. WILSON, Noel, S. COX, Philip HOEMANN, Michael, Z. CLAPHAM, Bruce MULLEN, Kelly, D. VASUDEVAN, Anil VILLAMIL, Clara I LI, Bin SOMAL, Gagandeep Patent: WO0/8 A, 0 Location in patent: Page/Page column 98 WO 0/08 A