Department of Physiology, Charité, Berlin, Germany.|Department of Physiology, Charité, Berlin, Germany.|Department of Physiology, Charité, Berlin, Germany.|Department of Physiology, Charité, Berlin, Germany.|Department of Physiology, Charité, Berlin, Germany.|Department of Physiology, Charité, Berlin, Germany.|Department of Physiology, Charité, Berlin, Germany.|Department of Physiology, Charité, Berlin, Germany.