Study design of the DAS-OLT trial: a randomized controlled trial to evaluate the impact of dexmedetomidine on early allograft dysfunction following liver transplantation oleh Chenlu Ni, Joe Masters, Ling Zhu, Weifeng Yu, Yingfu Jiao, Yuting Yang, Cui Cui, Suqing Yin, Liqun Yang, Bo Qi, Daqing Ma