参考文献:
AbbVie Inc. WANG, LE Doherty, George Wang, Xilu Tao, Zhi-Fu Bruncko, Milan Kunzer, Aaron R. Wendt, Michael D. Song, Xiaohong Frey, Robin Hansen, Todd M. Sullivan, Gerard M. Judd, Andrew Souers, Andrew Patent: US3/96 A, 3 Location in patent: Paragraph 34