The personality trait openness is related to cerebral 5-HTT levels. - Jan Kalbitzer; Vibe G. Frokjaer; David Erritzoe; Claus Svarer; Paul Cumming; Finn Årup Nielsen; Sayed H. Hashemi; William F. C. Baaré; Jacob Madsen; Steen Gregers Hasselbalch; Morten L. Kringelbach; Erik L. Mortensen; et al. (NeuroImage, 2009)