[1] Univ Coimbra, Fac Sci & Technol, Dept Life Sci, Coimbra, Portugal
[2] Univ Coimbra, Fac Pharm, Pharmaceut Technol Lab, Coimbra, Portugal
[3] Univ Coimbra, Ctr Neurosci & Cell Biol, Coimbra, Portugal
[4] Univ Turin, IFM & Mol Imaging Ctr, Dept Chem, I-10124 Turin, Italy