Retest imaging of [11C]NOP-1A binding to nociceptin/orphanin FQ peptide (NOP) receptors in the brain of healthy humans. - Talakad G. Lohith; Sami S. Zoghbi; Cheryl L. Morse; Maria D. Ferraris Araneta; Vanessa N. Barth; Nancy A. Goebl; Johannes T. Tauscher; Victor W. Pike; Robert B. Innis; Masahiro Fujita (NeuroImage, 2014)