1. Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
2. Department of Clinical Neuroscience, Center for Psychiatry Research, Karolinska Institutet and Stockholm County Council, SE-171 76 Stockholm, Sweden
3. Isotope Chemistry, Pharmaceutical Sciences, IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden
4. PET Science Centre, Precision Medicine and Genomics, IMED Biotech Unit, AstraZeneca, Karolinska Institutet, S-171 76 Stockholm, Sweden