Huwyler, T.; Stirnemann, J.; Vuilleumier, N.; Marti, C.; Dugas, S.; Poletti, P.-A.; Sarasin, F. . P.; Rutschmann, O. . T. Profound Hyponatraemia in the Emergency Department: Seasonality and Risk Factors. Swiss Med Wkly 2016, 146, w14385.