5-HT4 receptor binding in hippocampus or prefrontal cortex is not associated with long-term memory test performance. - Mette T. Haahr; Karine Madsen; Lisbeth Marner; A. Gade; Erik L. Mortensen; G. Zornhagen; Szabolcs Lehel; William F. C. Baaré; Gitte Moos Knudsen; Steen Gregers Hasselbalch (NeuroImage, 2010)