Funding for this research was provided by:
National Science Foundation of China (61702406, 31671372)
National Science and Technology Major Project of China (2018ZX10302205)
National Key R&D Program of China (2018YFC0910400, 2017YFC0907500)
National Institutes of Health (U41HG007497, U41HG007497)
First Online: 24 May 2019
: The authors declare that they have no competing interests.