Opinion: Focus on preclinical sex differences will not address women's and men's health disparities.

Sarah S. Richardson, Meredith Reiches, Heather Shattuck-Heidorn, Michelle Lynne LaBonte, and Theresa Consoli Department of the History of Science, Harvard University, Cambridge, MA; Committee on Degrees in Studies of Women, Gender, and Sexuality, Harvard University, Cambridge, MA; Department of Anthropology, University of Massachusetts, Boston, MA; Department of Human Evolutionary Biology, Harvard University, Cambridge, MA; and School for Global Inclusion and Social Development, University of Massachusetts, Boston, MA