Qualitative and Quantitative Analytical Techniques of Nucleic Acid Modification Based on Mass Spectrometry for Biomarker Discovery oleh Ying Liu, Jia-Hui Dong, Xu-Yang Shen, Yi-Xuan Gu, Run-Hong Zhang, Ruo-Yao Cui, Ya-Hong Liu, Jiang Zhou, Ying-Lin Zhou, Xin-Xiang Zhang