Effect of a multistage ultraendurance triathlon on aldosterone, vasopressin, extracellular water and urine electrolytes - Knechtle, B; Morales, N P; González, E R; Gutierrez, A A; Sevilla, J N; Gómez, R A; Robledo, A R; Rodríguez, A L; Fraire, O S; Andonie, J L; Lopez, L C; Kohler, G; Rosemann, T (Scott Med J, 2012)