1. Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA.
2. Department of Biology, University of Bari, Bari 70126, Italy.
3. Department of Obstetrics and Gynecology, University of Washington, Seattle, WA 98195, USA.
4. Division of Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA.
5. Department of Pediatrics, University of Washington School of Medicine, Seattle, WA 98195, USA.
6. Global Alliance to Prevent Prematurity and Stillbirth, an initiative of Seattle Children’s, Seattle, WA 98101, USA.
7. Department of Obstetrics and Gynecology, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA.
8. Department of Pediatrics, University of Iowa, Iowa City, IA 52242, USA.
9. Treuman Katz Center for Pediatric Bioethics, Seattle Children’s Research Institute, Seattle, WA 98101, USA.
10. Howard Hughes Medical Institute, Seattle, WA 98195, USA.