Neuronal correlates of symptom formation in functional somatic syndromes: A fMRI study. - Michael Landgrebe; Winfried Barta; Katharina Rosengarth; Ulrich Frick; Simone Hauser; Berthold Langguth; Roland Marcus Rutschmann; Mark W. Greenlee; Goeran Hajak; Peter Eichhammer (NeuroImage, 2008)