[1] Univ Zurich Hosp, Clin Nephrol, Zurich, Switzerland
[2] Univ Zurich Hosp, Div Clin Pharmacol & Toxicol, Zurich, Switzerland
[3] Univ Zurich, Inst Physiol, CH-8006 Zurich, Switzerland
[4] Univ Zurich, Ctr Integrat Human Physiol, CH-8006 Zurich, Switzerland