[1] Univ Newcastle, Inst Ageing & Hlth, Newcastle Upon Tyne, Tyne & Wear, England
[2] UCL, Dept Mental Hlth Sci, London, England
[3] Ludwig Maximilians Univ Hosp, Dept Nucl Med, Munich, Germany
[4] Univ Amsterdam, Acad Med Ctr, Dept Nucl Med, NL-1105 AZ Amsterdam, Netherlands
[5] Univ Nice, Fac Med, Dept Nucl Med, Nice, France
[6] Univ Hosp Brescia, Dept Neurol, Brescia, Italy
[7] Spedali Civili Brescia, Dept Nucl Med, Brescia, Italy
[8] Univ Hosp Pisa, Dept Nucl Med, Pisa, Italy
[9] Univ Hosp Pisa, Dept Neurol, Pisa, Italy
[10] Moorgreen Hosp, Memory Assessment & Res Ctr, Southampton, Hants, England
[11] Southampton Gen Hosp, Dept Nucl Med, Southampton SO9 4XY, Hants, England
[12] Uckfield Community Hosp, Uckfield, England
[13] GE Healthcare, Clin Res & Dev, Munich, Germany
[14] Med AG, Munich, Germany