1. The Limits of Acceptable Biological Variation in Elite Athletes: Should Sex Ambiguity Be Treated Differently From Other Advantageous Genetic Traits? 
J. Michael Bostwick, MD, Michael J. Joyner, MD 
Mayo Clinic Proceedings 
Volume 87, Issue 6, Pages (June 2012)
DOI: /j.mayocp
Copyright © 2012 Mayo Foundation for Medical Education and Research Terms and Conditions

2. FIGURE
Semenya runs ahead of Kostetskaya and Sinclair during the women's 800 meters semi-finals at the IAAF World Championships.
Used with permission from Lee Jae Won/Reuters.3
Mayo Clinic Proceedings  , DOI: ( /j.mayocp )
Copyright © 2012 Mayo Foundation for Medical Education and Research Terms and Conditions