Sean Ferrer founded the Audrey Hepburn Children's Fund in memory of his mother shortly after her death. The US Fund for UNICEF also founded the Audrey Hepburn Society: chaired by Luca Dotti, it celebrates UNICEF's biggest donors and has raised almost US$100,000,000 to date. Dotti also became patron of the Pseudomyxoma Survivor charity, dedicated to providing support to patients of the rare cancer Hepburn suffered from, pseudomyxoma peritonei, and the rare disease ambassador since 2014 and for 2015 on behalf of European Organisation for Rare Diseases.