Philippe Lachance1, Paul Isenring1, Pierre Douville2, Fabrice Mac-Way1. 1. Division of Nephrology, l'Hôtel-Dieu de Québec Hospital and Research Center of CHU de Québec, Department of Medicine, Faculty of Medicine, Laval University, Quebec, Quebec, Canada. 2. Division of Biochemistry, l'Hôtel-Dieu de Québec Hospital of CHU de Québec, Quebec, Canada.