

Acknowledgements
Mauro Cattaneo, Claudio Fiorino – dept Medical Physics, San Raffaele
Hospital, Milano
Tiziana Rancati - Istituto dei Tumori, Milano
Marco Schwarz – Centro di terapia dei protoni, Trento
Eva Onjukka – dept Medical Physics, Karolinska University Hospital,
Stockholm
Alan E. Nahum – Clatterbridge Center, UK