1. Council on Graduate Medical Education. Fifth report: women & medicine: physician education in women’s health and women in the physician workforce. Washington, DC: U.S. Department of Health and Human Services, Public Health Service, Health Resources and Services; 1995 July. Pub. No. HRSA-P-DM-91-1.
2. Wizemann TM, Pardue ML. Exploring the biological contributions to human health: does sex matter? Board on Health Sciences Policy. Washington, DC: Institute of Medicine; 2001.
3. NIH Guide. NIH Guidelines on the inclusion of women and minorities as subjects in clinical research. 1994;23(11). Available from: http://grants.nih.gov/grants/guide/notice-files/not94-100.html [Accessed 16 May 2016].
4. Our introductory discussion of sex and gender refers to both variables as a binary system. However, intersex is an another category for sex in addition to male and female. Kaneshiro NK. Intersex. Bethesda: U.S. National Library of Medicine MedlinePlus Medical Encyclopedia. [cited 2016 Jan 12]. Available from https://www.nlm.nih.gov/medlineplus/ency/article/001669.htm .
5. Connell RW. Gender. Cambridge U.K and Malden. MA: Polity Press; 2002.