1. Department of Chemistry and Applied Biosciences; Center for Radiopharmaceutical Sciences of ETH, PSI and USZ; Swiss Federal Institute of Technology (ETH); Vladimir-Prelog-Weg 4 CH-8093 Zurich Switzerland
2. Center for Radiopharmaceutical Sciences of ETH, PSI and USZ; Paul-Scherrer Institute; Villigen CH-5232 Switzerland
3. Novartis Institutes for BioMedical Research; Novartis Pharma AG; CH-4002 Basel Switzerland