1. Universidade da Coruña, Centro Interdisciplinar de Química e Bioloxía (CICA) and Departamento de Química, Facultade de Ciencias, A Coruña 15071, Galicia, Spain
2. Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama 35205, United States
3. Department of Radiology, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States
4. Departamento de Química Inorgánica, Facultad de Ciencias, Universidade de Vigo, As Lagoas, Marcosende 36310, Pontevedra, Spain
5. Bracco Imaging SpA, CRB Trieste, AREA Science Park, ed. Q─S.S. 14 Km 163,5, 34149 Basovizza, TS, Italy