1Dept. of Neurology, Aarhus University Hospital, Aarhus C, Denmark, 2Dept. of Neuroradiology, Würzburg University Hospital, Würzburg, Germany, 3MR Research Centre, Aarhus University Hospital, Aarhus N, Denmark, 4Dept. of Neurophysiology, Aarhus University Hospital, Aarhus C, Denmark, 5Heidelberg University Hospital, Heidelberg, Germany, 6Dept. of Endocrinology, Aarhus University Hospital, Aarhus C, Denmark