Yuting Ye1, Jingyi Jessica Li2,3. 1. Division of Biostatistics, University of California, Berkeley, USA. 2. Department of Statistics, University of California, 8125 Math Sciences Bldg, Los Angeles, USA. jli@stat.ucla.edu. 3. Department of Human Genetics, University of California, 695 Charles E. Young Drive South, Los Angeles, USA. jli@stat.ucla.edu.