1. Univ. Lille, CNRS, INRA, ENSCL, UMR 8207—UMET—Unité Matériaux et Transformations, F-59000 Lille, France
2. Institut Laue Langevin, 71 Av. des Martyrs, CS 20156, F-38042, Grenoble, France
3. Univ. Lille, Inserm, CHU Lille, U1008—Controlled Drug Delivery Systems and Biomaterials, F-59000 Lille, France