1 Guangdong Provincial Center for Disease Control and Prevention, No. 160, Qunxian Road, Panyu District, Guangzhou, China.
2 Guangdong Provincial Institution of Public Health, Guangdong Provincial Center for Disease Control and Prevention, No. 160, Qunxian Road, Panyu District, Guangzhou, China.
3 Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK.
4 Division of Structural Biology, Wellcome Trust Centre for Human Genetics University of Oxford, Oxford OX3 7BN, UK.