Analysis of codon usage in type 1 and the new genotypes of duck hepatitis virus. - Meng Wang; Jie Zhang; Jian-hua Zhou; Hao-tai Chen; Li-na Ma; Yao-zhong Ding; Wen-qian Liu; Yuan-xing Gu; Feng Zhao; Yong-sheng Liu (Biosyst., 2011)