参考文献:
AMGEN INC. ASHTON, Kate BARTBERGER, Michael David BO, Yunxin BRYAN, Marian C. CROGHAN, Michael FOTSCH, Christopher Harold HALE, Clarence Henderson KUNZ, Roxanne Kay LIU, Longbin NISHIMURA, Nobuko NORMAN, Mark H. PENNINGTON, Lewis Dale POON, Steve Fong STEC, Markian Myroslaw ST. JEAN, David, Joseph, Jr. TAMAYO, Nuria A. TEGLEY, Christopher Michael YANG, Kevin Chao Patent: WO1/761 A1, 1 WO 1/761 A1