Fei Wang, Youping Wu, Lu Tang, Weimin Zhu, Feng Chen, Tao Xu, Lulong Bo, Jinbao Li* and Xiaoming Deng*
* Corresponding authors: Jinbao Li lijinbaoshanghai@163.com - Xiaoming Deng deng_x@yahoo.com
Critical Care 2012, 16:R74 doi:10.1186/cc11331