1 Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520; oliver.griffith@yale.edu.
2 Yale Systems Biology Institute, Yale University, New Haven, CT 06516.
3 Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520.
4 Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Detroit, MI 48201.
5 Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI 48109.
6 Department of Epidemiology and Biostatistics, Michigan State University, East Lansing, MI 48824.
7 Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI 48202.
8 Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI 48202.
9 Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale Medical School, New Haven, CT 06510.