Association analysis and distribution of chronic gastritis syndromes based on associated density. - Guo-Ping Liu 007; Yi-Qin Wang; Fu-Feng Li; Hai-Xia Yan; Jing-Jing Fu; Jie Zhao; Rui-Wen Zhen; Shi-Xing Yan; Guo-Zheng Li (BIBM Workshops, 2010)