1. Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
2. Radiopharmaceutical Chemistry Section, Nuclear Medicine Unit, AUSL-IRCCS Reggio Emilia, 42122 Reggio Emilia, Italy
3. Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
4. Life Sciences Division, TRIUMF, Vancouver, British Columbia V6T 2A3, Canada