Author information:
(1)Gene Regulatory Lab, School of Medicine, Tsinghua University, Beijing 100084, 
China.
(2)Gene Regulatory Lab, School of Medicine, Tsinghua University, Beijing 100084, 
China; Tsinghua Fly Center, Tsinghua University, Beijing 100084, China; School 
of Basic Medical Sciences, Wuhan University, Wuhan 430071, China; College of 
Bioengineering, Hubei University of Technology, Wuhan 430068, China.
(3)Gene Regulatory Lab, School of Medicine, Tsinghua University, Beijing 100084, 
China; Sichuan Academy of Grassland Science, Chengdu 611731, China.
(4)Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.
(5)Tsinghua Fly Center, Tsinghua University, Beijing 100084, China.
(6)Department of Genetics, Stanford University, Stanford, CA 94305, USA.
(7)Gene Regulatory Lab, School of Medicine, Tsinghua University, Beijing 100084, 
China; Tsinghua Fly Center, Tsinghua University, Beijing 100084, China.
(8)Department of Molecular and Cellular Medicine, College of Medicine, Texas A&M 
Health Science Center, College Station, TX 77843, USA.
(9)Department of Genetics, Stanford University, Stanford, CA 94305, USA. 
Electronic address: jin.billy.li@stanford.edu.
(10)Gene Regulatory Lab, School of Medicine, Tsinghua University, Beijing 
100084, China. Electronic address: nijq@mail.tsinghua.edu.cn.