参考文献

Souers, Andrew J.; Collins, Christine A.; Gao, Ju; Judd, Andrew S.; Kym, Philip R.; Mulhern, Mathew M.; Sham, Hing L.; Wodka, Dariusz Patent: US2005/137187 A1, 2005 ; Location in patent: Page/Page column 23-24 ; US 20050137187 A1