Analysis of
LI Ping;WANG Ju-sheng;ZHAO Jing-xia;WANG Ping;LIU Xin;ZHANG Guang-zhong;ZHOU Dong-mei
Journal of Capital Medical University . 2009, (4): 413 -417 .  DOI: 10.3785/j.issn.1006-7795.2009.04.002