参考文献:
Long, Daniel D. Church, Timothy J. Jacobsen, John R. Jiang, Lan Saito, Daisuke Roland Stergiades, Ioanna Van Dyke, Priscilla M. Dalziel, Sean Preza, Leticia Maria Patent: US2007/219278 A1, 2007 Location in patent: Page/Page column 41 US 20070219278 A1