Institute of Physiology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany.|Institute of Physiology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany.|Institute of Physiology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany.|Institute of Physiology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany.|Institute of Physiology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany.|Institute of Physiology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany.