Daniela Truffer (R) head of Zwischengeschlecht. org and Markus Bauer hold placards during a demonstration in front of the International Olympic Committee (IOC) headquarters in Lausanne November 19, 2009. Zwischengeschlecht. org, a human rights advocacy group dedicated to hermaphrodites or intersexed persons, are requesting from the IOC and the International Association of Athletics Federations (IAAF) a fair treatment for the case of South African runner Caster Semenya whose victory in the women's 800 metres final at the World Athletics Championship in August 2009 has been overshadowed by a gender testing row.