Bilal, Erhan|Sakellaropoulos, Theodore|Melas, Ioannis N|Messinis, Dimitris E|Belcastro, Vincenzo|Rhrissorrakrai, Kahn|Meyer, Pablo|Norel, Raquel|Iskandar, Anita|Blaese, Elise|Rice, John J|Peitsch, Manuel C|Hoeng, Julia|Stolovitzky, Gustavo|Alexopoulos, Leonidas G|Poussin, Carine|Challenge Participants