I am a breast cancer surgeon and a passionate runner; in my hospital work, I stand by patients facing a tough illness every day. I want this challenge in Paris to provide tangible support to the warriors I see fighting day by day. I want to support Gustave Roussy because, having worked at an oncology center like the IEO, I know that progress and better treatments are possible when backed by research. Donations are processed through Alvarum. It is very easy and 100% secure. Thank you for your help! Susanna Di Silvestre