参考文献

Erickson, Shawn David; Baldwin, John J.; Dolle III, Roland Ellwood; Inglese, James; Ohlmeyer, Michael H.J.; Ho, Koc-Kan; Bohnstedt, Adolph C.; Kultgen, Steven G.; Conti, Paolo Giovanni Martino; Leysen, Dirk; van der Louw, Jaap Patent: US2004/87601 A1, 2004 ; Location in patent: Page 27 ; US 20040087601 A1