1. Università degli Studi di Genova & Istituto Nazionale per la Ricerca sul Cancro; Genova; Italy
2. A.A. Baikov Institute of Metallurgy and Materials Science; Russian Academy of Sciences; Moscow; Russia
3. CREATIS Inserm U1044; CNRS 5220, Université de Lyon; INSA Lyon; 69621 Villeurbanne Cedex; France and ESRF; BP220, 38043; Grenoble Cedex