Institute of Neural Information Processing, University of Ulm and Department of Internal Medicine I, University Hospital Ulm, 89081 Ulm, Germany.|Institute of Neural Information Processing, University of Ulm and Department of Internal Medicine I, University Hospital Ulm, 89081 Ulm, Germany.|Institute of Neural Information Processing, University of Ulm and Department of Internal Medicine I, University Hospital Ulm, 89081 Ulm, Germany.