Funding for this research was provided by:
Norwegian Research Council (187615)
National Natural Science Foundation of China (61721003, 61673231)
First Online: 18 July 2018
: AK is a postdoctoral fellow at the Computational Biology & Gene Regulation Group, Centre for Molecular Medicine Norway (NCMM), University of Oslo, Norway.XZ is Professor of Bioinformatics and Pattern Recognition of Tsinghua University, Department of Automation, and the Director of Bioinformatics Division, BNRIST (Beijing National Research Center for Information Science and Technology), Tsinghua University, China.
: The authors declare that they have no competing interests.
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