Xiang, Dezhi; Yan, Dejun; Xu, Chongli; Shao, Ying; Fu, Ping; Wang, Hongwei; Su, Shunli; Wei, Jiarong; Wang, Changjing; Shang, Qinghe; Li, Jian; Dou, Yan; Du, Hui; Miao, Jinchao; Liu, Hui; Li, Yongwei; Li, Lianfeng; Xu, Yongmei; Zhang, Mei; Zhang, Xianxu Patent: US2012/296097 A1, 2012 ; Location in patent: Page/Page column 5 ;