[1] Piramal Imaging GmbH, Berlin, Germany
[2] Mol Neuroimaging, New Haven, CT USA
[3] Univ Leipzig, D-04109 Leipzig, Germany
[4] Indiana Univ Sch Med, Indianapolis, IN 46202 USA
[5] Puget Sound Hlth Care Syst, Seattle, WA USA
[6] Univ Washington, Seattle, WA 98195 USA
[7] Univ Edinburgh, Edinburgh, Midlothian, Scotland
[8] Univ Gottingen, D-37073 Gottingen, Germany
[9] Bayer Pharma AG, Berlin, Germany