Moreira P., Sousa A. S., Guerra R. S., Santos A., Borges N., Afonso C., Amaral T. F. and Padrão P. (2018) “Sodium and potassium urinary excretion and their ratio in the elderly: results from the Nutrition UP 65 study”, Food & Nutrition Research, 620. doi: 10.29219/fnr.v62.1288.