Test-retest variability of high resolution positron emission tomography (PET) imaging of cortical serotonin (5HT2A) receptors in older, healthy adults. - Tiffany W. Chow; David C. Mamo; Hiroyuki Uchida; Ariel Graff-Guerrero; Sylvain Houle; Gwenn S. Smith; Bruce G. Pollock; Benoit H. Mulsant (BMC Medical Imaging, 2009)