1. Institute of Vegetative Physiology, Berlin, Germany;
2. Department of Nephrology, Charité-Universitätsmedizin Berlin, Berlin, Germany;
3. Department of Physiology, Zhejiang University School of Medicine, Hangzhou, China; and
4. Medical Faculty Mannheim, Research Division Cardiovascular Physiology, Centre for Biomedicine and Medical Technology Mannheim, Heidelberg University, Mannheim, Germany