Basal opioid receptor binding is associated with differences in sensory perception in healthy human subjects: A [18F]diprenorphine PET study. - Christina Mueller; André Klega; Hans-Georg Buchholz; Roman Rolke; Walter Magerl; Ralf Schirrmacher; Esther Schirrmacher; Frank Birklein; Rolf-Detlef Treede; Mathias Schreckenberger (NeuroImage, 2010)