1. The Wellcome Sanger Institute, Hinxton, Cambridgeshire CB10 1SA, UK
2. Liverpool Women’s Hospital, Liverpool L8 7SS, UK
3. Glendon College, York University, Toronto, Ontario M4N 3N6, Canada
4. BGI-Shenzhen, Shenzhen 518083, China
5. James D. Watson Institute of Genome Science, 310008 Hangzhou, China
6. Research Department of Genetics, Evolution and Environment, University College London, WC1E 6BT, UK, and University College London (UCL) Genetics Institute, University College London, WC1E 6BT, UK